guojianz/MolReasoner huggingface dataset:
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][O][C][C][=C][C][=C][Branch2][Ring1][Branch2][C][=C][C][=N][C][Branch1][=C][N][C][=C][C][=C][C][Branch1][Ring1][O][C][=C][Ring1][Branch2][=N][Ring1][#C][C][=N][N][Ring2][Ring1][Ring2][N][=Ring2][Ring1][Branch2]

The molecule is a pyrazolopyridazine that is pyrazolo[1,5-b]pyridazine which is substituted by a 2-(3-methoxyanilino)pyrimidin-4-yl group at position 3 and by an ethoxy group at position 6. It is a CLK4 kinase inhibitor. It has a role as an EC 2.7.12.* [dual-specificity kinases (those acting on Ser/Thr and Tyr residues)] inhibitor. It is a pyrazolopyridazine, an aromatic ether, a substituted aniline, a secondary amino compound and a member of pyrimidines.

SMILES: CCOc1ccc2c(-c3ccnc(Nc4cccc(OC)c4)n3)cnn2n1
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[O][C][C][O][C][C][Branch1][=Branch1][C][O][C][C][O][Branch1][=Branch1][C][O][C][C][O][C][O][C][C][O]

The molecule is a hydroxypolyether in which a hydroxy-poly(ethylene oxide) chain is connected to each of the methyl groups of neopentane. It is commonly used to crystallise proteins. It has a role as a crystallisation adjutant.

SMILES: OCCOCC(COCCO)(COCCO)COCCO
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[O][=P][Branch1][C][O][Branch1][C][O][O][C][C@@H1][Branch1][C][O][C@H1][Branch1][C][O][C@@H1][Branch1][C][O][C][O]

The molecule is an alditol 5-phosphate and a xylitol phosphate. It derives from a xylitol. It is a conjugate acid of a xylitol 5-phosphate(2-).

SMILES: O=P(O)(O)OCC(O)C(O)C(O)CO
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][Branch1][C][C][C][C][=C][C][=C][Branch1][#Branch2][C][Branch1][C][C][C][=Branch1][C][=O][O][C][=C][Ring1][O]

The molecule is a monocarboxylic acid that is propionic acid in which one of the hydrogens at position 2 is substituted by a 4-(2-methylpropyl)phenyl group. It has a role as a non-steroidal anti-inflammatory drug, a non-narcotic analgesic, a cyclooxygenase 2 inhibitor, a cyclooxygenase 1 inhibitor, an antipyretic, a xenobiotic, an environmental contaminant, a radical scavenger and a drug allergen. It derives from a propionic acid. It is a conjugate acid of an ibuprofen(1-).

SMILES: CC(C)Cc1ccc(C(C)C(=O)O)cc1
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C@@H1][O][C@@H1][Branch2][Branch2][#C][O][C@H1][C@H1][Branch2][#Branch1][#Branch2][O][C@H1][C@H1][Branch2][=Branch1][C][O][C@H1][C][C][C@@][Branch1][C][C][C@@H1][Branch2][Ring2][=N][C][C][C@][Branch1][C][C][C@@H1][Ring1][Branch2][C][C][=C][C@@H1][C][C][Branch1][C][C][Branch1][C][C][C@@H1][Branch1][C][O][C@@H1][Branch1][C][O][C@][Ring1][#Branch2][Branch1][C][C][C][C][C@][Ring1][#C][Ring2][Ring1][Ring2][C][C@@][Ring2][Ring1][=C][Branch1][C][C][C][O][O][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][C@@H1][Branch1][C][O][C@@H1][Ring2][Ring2][N][O][O][C@H1][Branch1][Ring1][C][O][C@H1][Branch1][C][O][C@@H1][Ring2][Branch1][#Branch1][O][C@H1][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Ring2][Branch1][P][O]

The molecule is a triterpenoid saponin that is composed of soyasapogenol A having an alpha-L-rhamnopyranosyl-(1->2)-beta-D-galactopyranosyl-(1->2)-beta-D-glucopyranosiduronic acid moiety attached at the 3-position via a glycosidic linkage. It is a pentacyclic triterpenoid, a triterpenoid saponin, a trisaccharide derivative and a carbohydrate acid derivative. It derives from a soyasapogenol A.

SMILES: CC1OC(OC2C(OC3C(OC4CCC5(C)C(CCC6(C)C5CC=C5C7CC(C)(C)C(O)C(O)C7(C)CCC56C)C4(C)CO)OC(C(=O)O)C(O)C3O)OC(CO)C(O)C2O)C(O)C(O)C1O
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O][C@H1][Branch2][Ring1][#Branch1][C][O][C][=Branch1][C][=O][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O-1]

The molecule is a 1,2-diacyl-sn-glycerol 3-phosphate(2-) in which the phosphatidyl acyl groups at postions 1 and 2 are specified as heptadecanoyl and stearoyl respectively. It is a conjugate base of a 1-heptadecanoyl-2-stearoyl-sn-glycero-3-phosphate.

SMILES: CCCCCCCCCCCCCCCCCC(=O)OC(COC(=O)CCCCCCCCCCCCCCCC)COP(=O)([O-])[O-]
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][Branch1][C][O][C][N][C][C][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][N][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][C][Ring2][Ring1][Branch2]

The molecule is a tricarboxylic acid trianion obtained by deprotonation of the three carboxy groups of 2,2',2''-[10-(2-hydroxypropyl)-1,4,7,10-tetraazacyclododecane-1,4,7-triyl]triacetic acid (HP-DO3A). It is a conjugate base of a H3HP-DO3A.

SMILES: CC(O)CN1CCN(CC(=O)[O-])CCN(CC(=O)[O-])CCN(CC(=O)[O-])CC1
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch2][Ring1][S][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O][C][C@H1][Branch1][C][O][C@H1][Branch1][C][O][C][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Ring1][#Branch2][O][C@H1][Branch1][C][O][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C]

The molecule is an inositol phosphodihydroceramide(1-) in which the N-acyl group is specified as hexanoyl; major species at pH 7.3. It is an inositol phosphodihydroceramide(1-) and an Ins-1-P-Cer-A 34:0(1-). It derives from a N-hexadecanoylsphinganine.

SMILES: CCCCCCCCCCCCCCCC(=O)NC(COP(=O)([O-])OC1C(O)C(O)C(O)C(O)C1O)C(O)CCCCCCCCCCCCCCC
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[N][C][=Branch1][C][=O][C][N][=C][N][Branch2][Ring1][Branch2][C@@H1][O][C@H1][Branch1][O][C][O][P][=Branch1][C][=O][Branch1][C][O][O][C@@H1][Branch1][C][O][C@H1][Ring1][N][O][C][=Ring2][Ring1][C][N][/C][=N][\C@@H1][O][C@H1][Branch1][O][C][O][P][=Branch1][C][=O][Branch1][C][O][O][C@@H1][Branch1][C][O][C@H1][Ring1][N][O]

The molecule is a 1-(phosphoribosyl)imidazolecarboxamide that is the 5-(5-phospho-beta-D-ribosylamino)methylidene derivative of 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamide. It has a role as a metabolite and an Escherichia coli metabolite. It is a conjugate acid of a 1-(5-phospho-beta-D-ribosyl)-5-[(5-phospho-beta-D-ribosylamino)methylideneamino]imidazole-4-carboxamide(4-).

SMILES: NC(=O)c1ncn(C2OC(COP(=O)(O)O)C(O)C2O)c1NC=NC1OC(COP(=O)(O)O)C(O)C1O
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[O][=C][/C][=Branch1][S][=C][/C][=C][C][=C][Branch1][C][O][C][Branch1][C][O][=C][Ring1][Branch2][O][C][=C][C][Branch2][Ring1][Branch1][O][C@@H1][O][C@H1][Branch1][Ring1][C][O][C@@H1][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Ring1][#Branch2][O][=C][C][Branch1][C][O][=C][Ring2][Ring1][Ring1][Ring2][Ring1][#C]

The molecule is a beta-D-glucoside in which a beta-D-glucopyranosyl residue is attached at position 6 of aureusidin via a glycosidic linkage. It is a beta-D-glucoside and a hydroxyaurone. It derives from an aureusidin.

SMILES: O=C1C(=Cc2ccc(O)c(O)c2)Oc2cc(OC3OC(CO)C(O)C(O)C3O)cc(O)c21
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][=Branch1][C][=O][N][C@H1][C@H1][Branch2][Ring2][#Branch2][O][C][C@H1][O][C@@H1][Branch2][Ring1][Branch1][O][C@H1][C@H1][Branch1][C][O][C@@H1][Branch1][C][O][C][Branch1][C][O][O][C@@H1][Ring1][=Branch2][C][O][C@H1][Branch1][C][O][C@@H1][Branch1][C][O][C@H1][Ring2][Ring1][Ring2][O][O][C@H1][Branch1][Ring1][C][O][C@@H1][Branch1][C][O][C@@H1][Ring2][Ring1][S][O]

The molecule is an amino trisaccharide consisting of 2-acetamido-2-deoxy-beta-D-glucopyranose, beta-D-galactopyranose and D-glucopyranose residues joined in sequence by (1->6) and (1->4) glycosidic bonds. It is a member of acetamides and an amino trisaccharide. It derives from a lactose and a beta-D-GlcpNAc-(1->6)-beta-D-Galp.

SMILES: CC(=O)NC1C(OCC2OC(OC3C(CO)OC(O)C(O)C3O)C(O)C(O)C2O)OC(CO)C(O)C1O
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][=Branch1][C][=O][N][C@H1][C@H1][Branch1][Branch2][O][C][C][C][C][C][N][O][C@H1][Branch1][Ring1][C][O][C@H1][Branch2][Ring2][N][O][C@@H1][O][C@@H1][Branch1][C][C][C@H1][Branch1][C][O][C@@H1][Branch1][C][O][C@H1][Ring1][=Branch2][O][C@H1][O][C@H1][Branch1][Ring1][C][O][C@@H1][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Ring1][#Branch2][N][C][Branch1][C][C][=O][C@@H1][Ring2][Ring2][Branch2][O]

The molecule is a linear trisaccharide derivative consisting of N-acetyl-alpha-D-glucosamine, alpha-L-rhamnose and N-acetyl-beta-D-galactosamine residues linked sequentially (1->2) and (1->4) with the N-acetylgalactosamine residue linked glycosidically to a 5-aminopentyl group. It is a trisaccharide derivative and a glycoside.

SMILES: CC(=O)NC1C(OC2C(OC3C(CO)OC(OCCCCCN)C(NC(C)=O)C3O)OC(C)C(O)C2O)OC(CO)C(O)C1O
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][N][C@@H1][Branch2][Ring2][Ring1][C][O][C@H1][O][C@H1][Branch1][Ring1][C][O][C@H1][Branch1][=C][O][C][C][=C][C][=C][Branch1][C][F][C][=C][Ring1][#Branch1][C@H1][Branch1][C][O][C@H1][Ring2][Ring1][C][O][C@H1][Branch1][C][O][C@H1][Branch1][C][O][C][C][C][C][C][C][C][C][C][C][C][C][C][C]

The molecule is a glycophytoceramide having a 4-O-(4-fluorobenzyl)-alpha-D-galactosyl residue at the O-1 position and a hexacosanoyl group attached to the nitrogen. One of a series of an extensive set of 4"-O-alkylated alpha-GalCer analogues evaluated (PMID:30556652) as invariant natural killer T-cell (iNKT) antigens. It derives from an alpha-D-galactose.

SMILES: CCCCCCCCCCCCCCCCCCCCCCCCCC(=O)NC(COC1OC(CO)C(OCc2ccc(F)cc2)C(O)C1O)C(O)C(O)CCCCCCCCCCCCCC
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][=Branch1][C][=O][O][C@@H1][C][C@@H1][Branch1][C][C][C@][Branch1][C][O][Branch1][=N][C][C][C][=C][C][=Branch1][C][=O][O][C][Ring1][=Branch1][C@@][Branch1][C][C][C][C][C][C][Branch1][C][C][Branch1][C][C][C@H1][Ring2][Ring1][#Branch1][Ring1][=Branch2]

The molecule is a labdane diterpenoid that is isolated from the fruits of Vitex trifolia L. and Vitex agnus-castus It has a role as a plant metabolite, an apoptosis inducer and an antineoplastic agent. It is an acetate ester, a carbobicyclic compound, a labdane diterpenoid, a tertiary alcohol and a butenolide.

SMILES: CC(=O)OC1CC(C)C(O)(CCC2=CC(=O)OC2)C2(C)CCCC(C)(C)C12
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][/C][=C][\C][C@@H1][O][/C][Ring1][Ring1][=C][\C][=C][/C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]

The molecule is an octadecanoid anion that is the conjugate base of (9Z,11Z,13S,15Z)-12,13-epoxyoctadecatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is an octadecanoid anion, a long-chain fatty acid anion and a polyunsaturated fatty acid anion. It is a conjugate base of a (9Z,11Z,13S,15Z)-12,13-epoxyoctadecatrienoic acid.

SMILES: CCC=CCC1OC1=CC=CCCCCCCCC(=O)[O-]
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O]

The molecule is a long-chain fatty acid that is henicosane in which one of the methyl groups has been oxidised to give the corresponding carboxylic acid. It is a straight-chain saturated fatty acid and a long-chain fatty acid. It is a conjugate acid of a henicosanoate.

SMILES: CCCCCCCCCCCCCCCCCCCCC(=O)O
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

Please provide a step-by-step analysis explaining how you interpret the molecular structure, identify key features and functional groups, and summarize it into a clear and informative description.

Think step by step, and your final answer **must** be returned in the format: <answer> ... </answer>. For example:
<answer>The molecule is an epoxy(hydroxy)icosatrienoate that is the conjugate base of 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an 11-hydroxy-(14R,15S)-epoxy-(5Z,8Z,12E)-icosatrienoic acid.</answer>

[C][C@@H1][O][C@@H1][Branch1][#C][O][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1][C@H1][Branch1][C][O][C][C@H1][Ring2][Ring1][Ring1][O]

The molecule is a hydroxy fatty acid ascaroside anion that is the conjugate base of oscr#10, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of an oscr#10.

SMILES: CC1OC(OCCCCCCCCC(=O)[O-])C(O)CC1O