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EC number: 245-821-7 | CAS number: 23680-84-4
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Endpoint summary
Administrative data
Key value for chemical safety assessment
Genetic toxicity in vitro
Description of key information
Based on the prediction done using the OECD QSAR toolbox version 3.4 with log kow as the primary descriptor and considering the five closest read across substances, gene mutation was predicted for 2-Chloro-6,7-dimethoxy-4-quinazolinamine. The study assumed the use of Salmonella typhimurium strains TA 1535, TA 1537, TA 98, TA 100 and TA 102 with S9 metabolic activation system. 2-Chloro-6,7-dimethoxy-4-quinazolinamine was predicted to not induce gene mutation in Salmonella typhimurium strains TA 1535, TA 1537, TA 98, TA 100 and TA 102 in the presence of S9 metabolic activation system and hence, according to the prediction made, it is not likely to classify as a gene mutant in vitro.
Based on the predicted result it can be concluded that the substance is considered to be not toxic as per the criteria mentioned in CLP regulation.
Link to relevant study records
- Endpoint:
- in vitro gene mutation study in bacteria
- Remarks:
- Type of genotoxicity: gene mutation
- Type of information:
- (Q)SAR
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification
- Justification for type of information:
- Data is from OECD QSAR Toolbox version 3.4 and the supporting QMRF report has been attached
- Qualifier:
- according to guideline
- Guideline:
- other: Refer below principle
- Principles of method if other than guideline:
- Prediction is done using OECD QSAR Toolbox version 3.4, 2017
- GLP compliance:
- not specified
- Type of assay:
- bacterial reverse mutation assay
- Specific details on test material used for the study:
- - Name of test material: 2-Chloro-6,7-dimethoxy-4-quinazolinamine
- IUPAC name: 2-chloro-6,7-dimethoxyquinazolin-4-amine
- Molecular formula: C10H10ClN3O2
- Molecular weight: 239.661 g/mol
- Smiles notation: n1c(c2cc(OC)c(cc2nc1Cl)OC)N
- Substance type: Organic - Target gene:
- Histidine
- Species / strain / cell type:
- S. typhimurium TA 1535, TA 1537, TA 98, TA 100 and TA 102
- Details on mammalian cell type (if applicable):
- Not applicable
- Additional strain / cell type characteristics:
- not specified
- Cytokinesis block (if used):
- No data
- Metabolic activation:
- with
- Metabolic activation system:
- S9 metabolic activation system
- Test concentrations with justification for top dose:
- No data
- Vehicle / solvent:
- No data
- Untreated negative controls:
- not specified
- Negative solvent / vehicle controls:
- not specified
- True negative controls:
- not specified
- Positive controls:
- not specified
- Positive control substance:
- not specified
- Details on test system and experimental conditions:
- No data
- Rationale for test conditions:
- No data
- Evaluation criteria:
- Prediction is done considering a dose dependent increase in the number of revertants/plate
- Statistics:
- No data
- Species / strain:
- S. typhimurium, other: TA 1535, TA 1537, TA 98, TA 100 and TA 102
- Metabolic activation:
- with
- Genotoxicity:
- negative
- Cytotoxicity / choice of top concentrations:
- not specified
- Vehicle controls validity:
- not specified
- Untreated negative controls validity:
- not specified
- Positive controls validity:
- not specified
- Additional information on results:
- No data
- Remarks on result:
- no mutagenic potential (based on QSAR/QSPR prediction)
- Conclusions:
- 2-Chloro-6,7-dimethoxy-4-quinazolinamine was predicted to not induce gene mutation in Salmonella typhimurium strains TA 1535, TA 1537, TA 98, TA 100 and TA 102 in the presence of S9 metabolic activation system and hence, according to the prediction made, it is not likely to classify as a gene mutant in vitro.
- Executive summary:
Based on the prediction done using the OECD QSAR toolbox version 3.4 with log kow as the primary descriptor and considering the five closest read across substances, gene mutation was predicted for 2-Chloro-6,7-dimethoxy-4-quinazolinamine. The study assumed the use of Salmonella typhimurium strains TA 1535, TA 1537, TA 98, TA 100 and TA 102 with S9 metabolic activation system. 2-Chloro-6,7-dimethoxy-4-quinazolinamine was predicted to not induce gene mutation in Salmonella typhimurium strains TA 1535, TA 1537, TA 98, TA 100 and TA 102 in the presence of S9 metabolic activation system and hence, according to the prediction made, it is not likely to classify as a gene mutant in vitro.
Based on the predicted result it can be concluded that the substance is considered to be not toxic as per the criteria mentioned in CLP regulation.
Reference
The
prediction was based on dataset comprised from the following
descriptors: "Gene mutation"
Estimation method: Takes highest mode value from the 6 nearest neighbours
Domain logical expression:Result: In Domain
(((((("a"
or "b" or "c" or "d" )
and ("e"
and (
not "f")
)
)
and "g" )
and ("h"
and (
not "i")
)
)
and ("j"
and (
not "k")
)
)
and ("l"
and "m" )
)
Domain
logical expression index: "a"
Referential
boundary: The
target chemical should be classified as Non-covalent interaction AND
Non-covalent interaction >> DNA intercalation AND Non-covalent
interaction >> DNA intercalation >> Fused-Ring Primary Aromatic Amines
AND Radical AND Radical >> Radical mechanism via ROS formation
(indirect) AND Radical >> Radical mechanism via ROS formation (indirect)
>> Fused-Ring Primary Aromatic Amines AND SN1 AND SN1 >> Nucleophilic
attack after metabolic nitrenium ion formation AND SN1 >> Nucleophilic
attack after metabolic nitrenium ion formation >> Fused-Ring Primary
Aromatic Amines by DNA binding by OASIS v.1.4
Domain
logical expression index: "b"
Referential
boundary: The
target chemical should be classified as AN2 AND AN2 >> Nucleophilic
addition to pyridonimine tautomer of aminopyridoindoles or
aminopyridoimidazoles (hypothesized) AND AN2 >> Nucleophilic addition to
pyridonimine tautomer of aminopyridoindoles or aminopyridoimidazoles
(hypothesized) >> Heterocyclic Aromatic Amines AND Radical reactions AND
Radical reactions >> ROS generation and direct attack of hydroxyl
radical to the C8 position of nucleoside base AND Radical reactions >>
ROS generation and direct attack of hydroxyl radical to the C8 position
of nucleoside base >> Heterocyclic Aromatic Amines AND SE reaction
(CYP450-activated heterocyclic amines) AND SE reaction (CYP450-activated
heterocyclic amines) >> Direct attack of arylnitrenium cation to the C8
position of nucleoside base AND SE reaction (CYP450-activated
heterocyclic amines) >> Direct attack of arylnitrenium cation to the C8
position of nucleoside base >> Heterocyclic Aromatic Amines AND SNAr
AND SNAr >> Nucleophilic aromatic substitution on activated aryl and
heteroaryl compounds AND SNAr >> Nucleophilic aromatic substitution on
activated aryl and heteroaryl compounds >> Activated aryl and heteroaryl
compounds AND SR reaction (peroxidase-activated heterocyclic amines) AND
SR reaction (peroxidase-activated heterocyclic amines) >> Direct attack
of arylnitrenium radical to the C8 position of nucleoside base AND SR
reaction (peroxidase-activated heterocyclic amines) >> Direct attack of
arylnitrenium radical to the C8 position of nucleoside base >>
Heterocyclic Aromatic Amines by Protein binding by OASIS v1.4
Domain
logical expression index: "c"
Referential
boundary: The
target chemical should be classified as SNAr AND SNAr >> Nucleophilic
aromatic substitution AND SNAr >> Nucleophilic aromatic substitution >>
Halo-pyrimidines by Protein binding by OECD
Domain
logical expression index: "d"
Referential
boundary: The
target chemical should be classified as Anilines (Unhindered) by Aquatic
toxicity classification by ECOSAR
Domain
logical expression index: "e"
Referential
boundary: The
target chemical should be classified as Non-covalent interaction AND
Non-covalent interaction >> DNA intercalation AND Non-covalent
interaction >> DNA intercalation >> Fused-Ring Primary Aromatic Amines
AND Radical AND Radical >> Radical mechanism via ROS formation
(indirect) AND Radical >> Radical mechanism via ROS formation (indirect)
>> Fused-Ring Primary Aromatic Amines AND SN1 AND SN1 >> Nucleophilic
attack after metabolic nitrenium ion formation AND SN1 >> Nucleophilic
attack after metabolic nitrenium ion formation >> Fused-Ring Primary
Aromatic Amines by DNA binding by OASIS v.1.4
Domain
logical expression index: "f"
Referential
boundary: The
target chemical should be classified as AN2 OR AN2 >> Michael-type
addition, quinoid structures OR AN2 >> Michael-type addition, quinoid
structures >> Quinoneimines OR AN2 >> Michael-type addition, quinoid
structures >> Quinones and Trihydroxybenzenes OR AN2 >> Carbamoylation
after isocyanate formation OR AN2 >> Carbamoylation after isocyanate
formation >> N-Hydroxylamines OR AN2 >> Schiff base formation by
aldehyde formed after metabolic activation OR AN2 >> Schiff base
formation by aldehyde formed after metabolic activation >> Geminal
Polyhaloalkane Derivatives OR No alert found OR Non-covalent interaction
>> DNA intercalation >> Acridone, Thioxanthone, Xanthone and Phenazine
Derivatives OR Non-covalent interaction >> DNA intercalation >> Amino
Anthraquinones OR Non-covalent interaction >> DNA intercalation >>
Aminoacridine DNA Intercalators OR Non-covalent interaction >> DNA
intercalation >> Coumarins OR Non-covalent interaction >> DNA
intercalation >> DNA Intercalators with Carboxamide and Aminoalkylamine
Side Chain OR Non-covalent interaction >> DNA intercalation >>
Fused-Ring Nitroaromatics OR Non-covalent interaction >> DNA
intercalation >> Organic Azides OR Non-covalent interaction >> DNA
intercalation >> Polycyclic Aromatic Hydrocarbon and Naphthalenediimide
Derivatives OR Non-covalent interaction >> DNA intercalation >> Quinones
and Trihydroxybenzenes OR Non-specific OR Non-specific >> Incorporation
into DNA/RNA, due to structural analogy with nucleoside bases OR
Non-specific >> Incorporation into DNA/RNA, due to structural analogy
with nucleoside bases >> Specific Imine and Thione Derivatives OR
Radical >> Radical mechanism by ROS formation OR Radical >> Radical
mechanism by ROS formation >> Five-Membered Aromatic Nitroheterocycles
OR Radical >> Radical mechanism by ROS formation >> Organic Azides OR
Radical >> Radical mechanism via ROS formation (indirect) >> Acridone,
Thioxanthone, Xanthone and Phenazine Derivatives OR Radical >> Radical
mechanism via ROS formation (indirect) >> Amino Anthraquinones OR
Radical >> Radical mechanism via ROS formation (indirect) >> C-Nitroso
Compounds OR Radical >> Radical mechanism via ROS formation (indirect)
>> Conjugated Nitro Compounds OR Radical >> Radical mechanism via ROS
formation (indirect) >> Coumarins OR Radical >> Radical mechanism via
ROS formation (indirect) >> Fused-Ring Nitroaromatics OR Radical >>
Radical mechanism via ROS formation (indirect) >> Geminal Polyhaloalkane
Derivatives OR Radical >> Radical mechanism via ROS formation (indirect)
>> N-Hydroxylamines OR Radical >> Radical mechanism via ROS formation
(indirect) >> Nitro Azoarenes OR Radical >> Radical mechanism via ROS
formation (indirect) >> Nitroaniline Derivatives OR Radical >> Radical
mechanism via ROS formation (indirect) >> Nitroarenes with Other Active
Groups OR Radical >> Radical mechanism via ROS formation (indirect) >>
Nitrobiphenyls and Bridged Nitrobiphenyls OR Radical >> Radical
mechanism via ROS formation (indirect) >> Nitrophenols, Nitrophenyl
Ethers and Nitrobenzoic Acids OR Radical >> Radical mechanism via ROS
formation (indirect) >> p-Aminobiphenyl Analogs OR Radical >> Radical
mechanism via ROS formation (indirect) >> Polynitroarenes OR Radical >>
Radical mechanism via ROS formation (indirect) >> p-Substituted
Mononitrobenzenes OR Radical >> Radical mechanism via ROS formation
(indirect) >> Quinones and Trihydroxybenzenes OR Radical >> Radical
mechanism via ROS formation (indirect) >> Single-Ring Substituted
Primary Aromatic Amines OR Radical >> Radical mechanism via ROS
formation (indirect) >> Specific Imine and Thione Derivatives OR Radical
>> Radical mechanism via ROS formation (indirect) >> Thiols OR Radical
>> ROS formation after GSH depletion (indirect) OR Radical >> ROS
formation after GSH depletion (indirect) >> Quinoneimines OR SN1 >>
Alkylation after metabolically formed carbenium ion species OR SN1 >>
Alkylation after metabolically formed carbenium ion species >>
Polycyclic Aromatic Hydrocarbon and Naphthalenediimide Derivatives OR
SN1 >> Nucleophilic attack after diazonium or carbenium ion formation OR
SN1 >> Nucleophilic attack after diazonium or carbenium ion formation >>
Nitroarenes with Other Active Groups OR SN1 >> Nucleophilic attack after
metabolic nitrenium ion formation >> Amino Anthraquinones OR SN1 >>
Nucleophilic attack after nitrene formation OR SN1 >> Nucleophilic
attack after nitrene formation >> Organic Azides OR SN1 >> Nucleophilic
attack after nitrenium ion formation OR SN1 >> Nucleophilic attack after
nitrenium ion formation >> N-Hydroxylamines OR SN1 >> Nucleophilic
attack after nitrenium ion formation >> p-Aminobiphenyl Analogs OR SN1
>> Nucleophilic attack after nitrenium ion formation >> Single-Ring
Substituted Primary Aromatic Amines OR SN1 >> Nucleophilic attack after
reduction and nitrenium ion formation OR SN1 >> Nucleophilic attack
after reduction and nitrenium ion formation >> Conjugated Nitro
Compounds OR SN1 >> Nucleophilic attack after reduction and nitrenium
ion formation >> Fused-Ring Nitroaromatics OR SN1 >> Nucleophilic attack
after reduction and nitrenium ion formation >> Nitro Azoarenes OR SN1 >>
Nucleophilic attack after reduction and nitrenium ion formation >>
Nitroaniline Derivatives OR SN1 >> Nucleophilic attack after reduction
and nitrenium ion formation >> Nitroarenes with Other Active Groups OR
SN1 >> Nucleophilic attack after reduction and nitrenium ion formation
>> Nitrobiphenyls and Bridged Nitrobiphenyls OR SN1 >> Nucleophilic
attack after reduction and nitrenium ion formation >> Nitrophenols,
Nitrophenyl Ethers and Nitrobenzoic Acids OR SN1 >> Nucleophilic attack
after reduction and nitrenium ion formation >> Polynitroarenes OR SN1 >>
Nucleophilic attack after reduction and nitrenium ion formation >>
p-Substituted Mononitrobenzenes OR SN1 >> Nucleophilic substitution
after glutathione-induced nitrenium ion formation OR SN1 >> Nucleophilic
substitution after glutathione-induced nitrenium ion formation >>
C-Nitroso Compounds OR SN1 >> Nucleophilic substitution on diazonium ion
OR SN1 >> Nucleophilic substitution on diazonium ion >> Specific Imine
and Thione Derivatives OR SN2 OR SN2 >> Acylation OR SN2 >> Acylation >>
N-Hydroxylamines OR SN2 >> Acylation involving a leaving group after
metabolic activation OR SN2 >> Acylation involving a leaving group after
metabolic activation >> Geminal Polyhaloalkane Derivatives OR SN2 >>
Alkylation, direct acting epoxides and related after P450-mediated
metabolic activation OR SN2 >> Alkylation, direct acting epoxides and
related after P450-mediated metabolic activation >> Polycyclic Aromatic
Hydrocarbon and Naphthalenediimide Derivatives OR SN2 >> Direct acting
epoxides formed after metabolic activation OR SN2 >> Direct acting
epoxides formed after metabolic activation >> Coumarins OR SN2 >> Direct
acting epoxides formed after metabolic activation >> Quinoline
Derivatives OR SN2 >> Nucleophilic substitution at sp3 carbon atom after
thiol (glutathione) conjugation OR SN2 >> Nucleophilic substitution at
sp3 carbon atom after thiol (glutathione) conjugation >> Geminal
Polyhaloalkane Derivatives OR SN2 >> SN2 at an activated carbon atom OR
SN2 >> SN2 at an activated carbon atom >> Quinoline Derivatives OR SN2
>> SN2 attack on activated carbon Csp3 or Csp2 OR SN2 >> SN2 attack on
activated carbon Csp3 or Csp2 >> Nitroarenes with Other Active Groups by
DNA binding by OASIS v.1.4
Domain
logical expression index: "g"
Referential
boundary: The
target chemical should be classified as No alert found by DNA binding by
OECD ONLY
Domain
logical expression index: "h"
Referential
boundary: The
target chemical should be classified as No alert found by DNA alerts for
AMES by OASIS v.1.4
Domain
logical expression index: "i"
Referential
boundary: The
target chemical should be classified as Non-covalent interaction OR
Non-covalent interaction >> DNA intercalation OR Non-covalent
interaction >> DNA intercalation >> Fused-Ring Primary Aromatic Amines
OR Radical OR Radical >> Radical mechanism via ROS formation (indirect)
OR Radical >> Radical mechanism via ROS formation (indirect) >>
Fused-Ring Primary Aromatic Amines OR SN1 OR SN1 >> Nucleophilic attack
after metabolic nitrenium ion formation OR SN1 >> Nucleophilic attack
after metabolic nitrenium ion formation >> Fused-Ring Primary Aromatic
Amines by DNA alerts for AMES by OASIS v.1.4
Domain
logical expression index: "j"
Referential
boundary: The
target chemical should be classified as Not known precedent reproductive
and developmental toxic potential by DART scheme v.1.0
Domain
logical expression index: "k"
Referential
boundary: The
target chemical should be classified as Aromatic di-amine derived diazo
dyes (12b) OR Aromatic di-amines: 2,4-diamino pyrimidine related
derivatives (12a) OR Known precedent reproductive and developmental
toxic potential OR Toluene and small alkyl toluene derivatives (8a) by
DART scheme v.1.0
Domain
logical expression index: "l"
Parametric
boundary:The
target chemical should have a value of log Kow which is >= -1.85
Domain
logical expression index: "m"
Parametric
boundary:The
target chemical should have a value of log Kow which is <= 2.94
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (negative)
Genetic toxicity in vivo
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
Gene toxicity in vitro:
Prediction model based estmation and data from read across chemical has been reviewed to determine the mutagenic nature of the test compound 2-Chloro-6,7-dimethoxy-4-quinazolinamine. The studies are as mentioned below:
Based on the prediction done using the OECD QSAR toolbox version 3.4 with log kow as the primary descriptor and considering the five closest read across substances, gene mutation was predicted for 2-Chloro-6,7-dimethoxy-4-quinazolinamine. The study assumed the use of Salmonella typhimurium strains TA 1535, TA 1537, TA 98, TA 100 and TA 102 with and without S9 metabolic activation system. 2-Chloro-6,7-dimethoxy-4-quinazolinamine was predicted to not induce gene mutation in Salmonella typhimurium strains TA 1535, TA 1537, TA 98, TA 100 and TA 102 in the presence and absence of S9 metabolic activation system and hence, according to the prediction made, it is not likely to classify as a gene mutant in vitro.
From the study for read across chemical (RA CAS no 369 -01 -0), Gene mutation toxicity study was performed by Mortelmans et al (Environmental Mutagenesis, 1986) for the test compound Triamterene to evaluate its mutagenic nature. The study was performed as per the preincubation protocol in two labs using Salmonella typhimurium strain TA100, TA1535, TA1537, TA98 both in the presence and absence of S9 metabolic activation system at doses of 0, 100, 333, 1000, 3333, 10000µg/plate in lab 1 and 0, 33, 100, 333, 1000, 2000, 3333 µg/plate in lab 2. The plates were incubated for 48 hrs after 20 mins preincubation before the evaluation of the revertant colonies could be made. Triamterene did not induce mutation in the Salmonella typhimurium strain TA100, TA1535, TA1537, TA98 both in the presence and absence of S9 metabolic activation system and hence is not likely to classify as a gene mutant in vitro.
Another Gene mutation toxicity study was performed (J-check, 2016) for the test compound Sodium naphthionate (RA CAS no 130 -13 -2) to evaluate its mutagenic nature. Salmonella typhimurium TA 98, TA 100, TA 1535, TA 1537 and Escherichia coli WP2 uvr A2 were used in the preincubation assay both in the presence and absence of S9 metabolic activation system at doses of 0, 313, 625, 1250, 2500, 5000µg/plate. The plates were incubated for 48 hrs after 20 mins preincubation before the evaluation of the revertant colonies could be made. Sodium naphthionate did not induce mutation in the Salmonella typhimurium TA 98, TA 100, TA 1535, TA 1537 and Escherichia coli WP2 uvr A2 both in the presence and absence of S9 metabolic activation system and hence is not likely to classify as a gene mutant in vitro.
Based on the data available for the target chemical and its read across, the test chemical 2-Chloro-6,7-dimethoxy-4-quinazolinamine does not exhibit gene mutation in vitro. Hence the test chemical is not likely to classify as a gene mutant in vitro as per the criteria mentionedin CLP regulation.
Justification for classification or non-classification
Based on the data available for the target chemical and its read across, the test chemical 2-Chloro-6,7-dimethoxy-4-quinazolinamine does not exhibit gene mutation in vitro. Hence the test chemical is not likely to classify as a gene mutant in vitro as per the criteria mentionedin CLP regulation.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.