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

The molecule is a streptomycin phosphate having the phosphate group placed at the 3''-position. It is a conjugate base of a streptomycin 3''-phosphate(1+).

SMILES: CNC1C(OC2C(OC3C(O)C(O)C(N=C(N)N)C(O)C3N=C(N)N)OC(C)C2(O)C=O)OC(CO)C(O)C1OP(=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>

[O][N][=C][C][=N][O]

The molecule is an aldoxime obtained by formal condensation of glyoxal with two molar equivalents of hydroxylamine. It derives from a glyoxal.

SMILES: ON=CC=NO
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][Ring1][=Branch1][C][Ring1][Ring2][Branch1][C][C][C]

The molecule is an isomer of pinene with an exocyclic double bond. It is a component of essential oils from many plants. It has a role as a plant metabolite.

SMILES: C=C1CCC2CC1C2(C)C
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][Branch1][C][N][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][O]

The molecule is a tripeptide composed of L-alanine, L-aspartic acid, and glycine units joined in sequence by peptide linkages. It has a role as a metabolite. It derives from a L-alanine, a L-aspartic acid and a glycine.

SMILES: CC(N)C(=O)NC(CC(=O)O)C(=O)NCC(=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>

[O][=N][C][=C][Branch2][Ring1][Ring2][C][=C][Branch1][C][O][NH1][C][=C][C][Branch1][C][Br][=C][C][=C][Ring1][O][Ring1][#Branch1][NH1][C][=C][C][=C][C][=C][Ring2][Ring1][Ring2][Ring1][=Branch1]

The molecule is a member of the class of biindoles that is indirubin substituted at position 6 by a bromo group and in which the keto group at position 3' has undergone condensation with hydroxylamine to form the corresponding oxime. It has a role as an EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor and an EC 2.7.11.26 (tau-protein kinase) inhibitor. It is a ketoxime, an organobromine compound, a member of oxindoles and a biindole.

SMILES: O=Nc1c(-c2c(O)[nH]c3cc(Br)ccc23)[nH]c2ccccc12
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][O][C][=C][C][Branch2][Ring2][C][C@@H1][C][=C][C][=C][Branch2][Ring1][Branch1][C][Branch1][C][O][=C][Ring1][#Branch1][C][C@H1][C][O][C][=Branch1][C][=O][C@@H1][Ring1][=Branch1][Ring1][#C][O][C][O][Ring1][#C][=C][C][Branch1][Ring1][O][C][=C][Ring2][Ring1][#Branch2][O][C]

The molecule is an organic heterotetracyclic compound that is alpha-peltatin in which the phenolic hydroxy group of the 4-hydroxy-3,5-dimethoxyphenyl substitutent had been converted into the corresponding methyl ether. It has a role as an antineoplastic agent and a plant metabolite. It is a furonaphthodioxole, a lignan, a member of phenols, a gamma-lactone and an organic heterotetracyclic compound. It derives from an alpha-peltatin.

SMILES: COc1cc(C2c3cc4c(c(O)c3CC3COC(=O)C32)OCO4)cc(OC)c1OC
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@@H1][Branch1][#C][C@@H1][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Branch1][C][O][C][O][C@@H1][Branch1][C][O][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]

The molecule is a member of the class of neuraminates obtained by deprotonation of the carboxy group of keto-neuraminic acid. It is a conjugate base of a keto-neuraminic acid.

SMILES: NC(C(O)CC(=O)C(=O)[O-])C(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][O][C][=C][C][Branch2][Ring1][#Branch2][C][O][C][=C][Branch1][Ring1][O][C][C][=C][Branch1][Branch1][/C][=C][/C][O][C][=C][Ring1][N][C][Ring1][#C][C][O][=C][C][=C][Ring2][Ring1][#Branch1][O]

The molecule is a guaiacyl lignin obtained by cyclodimerisation of coniferol. It has a role as a plant metabolite and an anti-inflammatory agent. It is a member of 1-benzofurans, a primary alcohol, a guaiacyl lignin and a member of guaiacols. It derives from a coniferol.

SMILES: COc1cc(C2Oc3c(OC)cc(C=CCO)cc3C2CO)ccc1O
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][C][=Branch1][C][=O][O]

The molecule is a 3-oxo monocarboxylic acid that is butyric acid bearing a 3-oxo substituent. It has a role as a metabolite. It is a ketone body and a 3-oxo fatty acid. It derives from a butyric acid. It is a conjugate acid of an acetoacetate. It is a tautomer of a 3-hydroxy-3-butenoic acid.

SMILES: CC(=O)CC(=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@H1][C@@H1][Branch1][=C][C][C][C][C][C][C][C][C@@][Ring1][=Branch1][Ring1][#Branch2][C][C@H1][Ring1][#C][C][C][C@@H1][Ring2][Ring1][C][C][=C][C][=Branch1][C][=O][O][C][Ring1][=Branch1]

The molecule is a steroid lactone that is a C23 steroid with methyl groups at C-10 and C-13 and a butenolide ring at C-17. It is a steroid fundamental parent and a member of cardenolides.

SMILES: CC12CCCCC1CCC1C2CCC2(C)C(C3=CC(=O)OC3)CCC12
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][N][C][C][C][C][C@H1][Branch1][C][N][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]

The molecule is a L-lysine derivative formed during the reaction between methylglyoxal and protein. CEL is a homologue of N(epsilon)-(carboxymethyl)lysine (CML), an advanced glycation end-product that is formed on reaction of glyoxal or glycolaldehyde with protein and on oxidative cleavage of fructoselysine, the Amadori adduct formed on glycation of protein by glucose. It is a L-lysine derivative and a non-proteinogenic L-alpha-amino acid.

SMILES: CC(NCCCCC(N)C(=O)O)C(=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][O][C][=Branch1][C][=O][C@@H1][Branch1][=Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C@@H1][C][C][C][C][N][Ring1][=Branch1]

The molecule is a methyl phenyl(piperidin-2-yl)acetate in which both stereocentres have S configuration. It is the inactive enantiomer in the racemic drug methylphenidate. It is an enantiomer of a dexmethylphenidate.

SMILES: COC(=O)C(c1ccccc1)C1CCCCN1
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@][Branch1][C][O][C][C@H1][C][N][Branch2][#Branch1][S][C][C][C][=C][Branch1][N][NH1][C][=C][C][=C][C][=C][Ring1][=Branch2][Ring1][=Branch1][C@@][Branch1][#Branch1][C][=Branch1][C][=O][O][C][Branch2][Branch1][#C][C][=C][C][=C][Branch1][#Branch1][C][=C][Ring1][=Branch1][O][C][N][Branch1][Ring1][C][=O][C@H1][C@@][Branch1][C][O][Branch1][#Branch1][C][=Branch1][C][=O][O][C][C@H1][Branch1][#Branch1][O][C][Branch1][C][C][=O][C@][Branch1][Ring1][C][C][C][=C][C][N][C][C][C@][Ring2][Ring1][#C][Ring2][Ring1][=Branch1][C@@H1][Ring1][Branch1][Ring1][O][C][Ring2][Branch1][=Branch1][C][Ring2][Branch1][#Branch2]

The molecule is a vinca alkaloid with formula C46H56N4O10 found in the Madagascar periwinkle, Catharanthus roseus. It is used (commonly as the corresponding sulfate salt)as a chemotherapy drug for the treatment of leukaemia, lymphoma, myeloma, breast cancer and head and neck cancer. It has a role as a tubulin modulator, a microtubule-destabilising agent, a plant metabolite, an antineoplastic agent and a drug. It is a methyl ester, an acetate ester, a tertiary alcohol, a member of formamides, an organic heteropentacyclic compound, an organic heterotetracyclic compound, a tertiary amino compound and a vinca alkaloid. It is a conjugate base of a vincristine(2+). It derives from a hydride of a vincaleukoblastine.

SMILES: CCC1(O)CC2CN(CCc3c([nH]c4ccccc34)C(C(=O)OC)(c3cc4c(cc3OC)N(C=O)C3C(O)(C(=O)OC)C(OC(C)=O)C5(CC)C=CCN6CCC43C65)C2)C1
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@H1][Branch1][C][C][C][=Branch1][C][=O][C][C][C][C][Ring1][Ring1][C][/C][=C][\C][C@@H1][Branch1][C][O][C@@H1][Branch1][Ring1][C][C][C][=Branch1][C][=O][O-1]

The molecule is the conjugate base of ketomycolic acid type-3 (XIII'). A class of mycolic acids characterized by the presence of a proximal cis C=C double bond followed by a cis-cyclopropyl group, a distal oxo group and a (CH-CH3) fragment of (S) stereochemistry in the meromycolic chain. It is a mycolate, a branched-chain fatty acid anion and an oxo fatty acid anion. It is a conjugate base of a ketomycolic acid type-3 (XIII').

SMILES: CCC(C)C(=O)CC1CC1CC=CCC(O)C(CC)C(=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][Branch2][Branch2][=N][C][C][C@@][Branch1][C][O][O][C@H1][C][C@H1][C@@H1][C][C][=C][C][C@@H1][Branch2][Branch1][O][O][C@@H1][O][C@H1][Branch1][Ring1][C][O][C@@H1][Branch2][Ring1][Ring2][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][Branch1][C][O][C@H1][Ring2][Ring1][Ring2][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][C][C@][Ring2][Ring2][=Branch1][Branch1][C][C][C@H1][Ring2][Ring2][O][C][C][C@][Ring2][Ring2][#C][Branch1][C][C][C@H1][Ring2][Branch1][Ring1][C@@H1][Ring2][Branch1][#Branch1][C][C][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]

The molecule is a spirostanyl glycoside that consists of the trisaccharide alpha-L-Rha-(1->4)-[alpha-L-Rha-(1->2)]-beta-D-Glc attached to position 3 of 26-(beta-D-glucopyranosyloxy)-3beta,22-dihydroxyfurost-5-ene via a glycosidic linkage. Found in several plant species including yams, asparagus and funugreek. It has a role as a metabolite. It is a steroid saponin, a trisaccharide derivative, a beta-D-glucoside, a pentacyclic triterpenoid and a cyclic hemiketal. It derives from a diosgenin. It derives from a hydride of a spirostan.

SMILES: CC(CCC1(O)OC2CC3C4CC=C5CC(OC6OC(CO)C(OC7OC(C)C(O)C(O)C7O)C(O)C6OC6OC(C)C(O)C(O)C6O)CCC5(C)C4CCC3(C)C2C1C)COC1OC(CO)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>

[57Fe]

The molecule is the stable isotope of iron with relative atomic mass 56.935399, 2.1 atom percent natural abundance and nuclear spin 1/2.

SMILES: [Fe]
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][=C][Branch1][Ring1][C][O][C][=Branch1][C][=O][C@@H1][O][C@H1][Ring1][#Branch2][Ring1][Ring1]

The molecule is an epoxide resulting from epoxidation of the 5-6 double bond of 2-(hydroxymethyl)-1,4-benzoquinone (the 5S,6R enantiomer). It has a role as a Penicillium metabolite. It is an epoxide, a cyclic ketone and a primary allylic alcohol.

SMILES: O=C1C=C(CO)C(=O)C2OC12
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@H1][O][C][Branch1][C][O][C][C@@H1][Ring1][=Branch1][O]

The molecule is a deoxypentose that is D-ribofuranose in which the hydroxy group at position C-2 is replaced by hydrogen. It has a role as a Saccharomyces cerevisiae metabolite, a human metabolite and a mouse metabolite.

SMILES: OCC1OC(O)CC1O