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][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][Branch1][C][O][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][O][C@H1][Branch1][C][O][/C][=C][/C][C][C][C][C][C][C][C][C][C][Branch1][C][C][C]

The molecule is an N-acyl-15-methylhexadecasphing-4-enine in which the acyl group has 24 carbons and 0 double bonds and is 2-hydroxylated. It derives from a 15-methylhexadecasphing-4-enine.

SMILES: CCCCCCCCCCCCCCCCCCCCCCC(O)C(=O)NC(CO)C(O)C=CCCCCCCCCCC(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][=C][C@@H1][/C][=C][/C][C@H1][Branch1][C][C][C][=Branch1][C][=O][C@@H1][Branch1][C][C][/C][=C][/C][=Branch1][C][=O][C@][Ring1][#C][C][=Branch1][C][=O][N][C@@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C@@H1][Ring1][=N][C@@H1][Ring2][Ring1][=C][C]

The molecule is a cytochalasan alkaloid found in Aspergillus clavatus. It has a role as an Aspergillus metabolite. It is a cytochalasan alkaloid, an organic heterotricyclic compound, an enone, a gamma-lactam, a cyclic ketone and a macrocycle.

SMILES: CC1=CC2C=CCC(C)C(=O)C(C)C=CC(=O)C23C(=O)NC(Cc2ccccc2)C3C1C
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][C@H1][Branch2][Ring1][#Branch1][C][C][C@@H1][C][Branch1][C][C][Branch1][C][C][C][C@H1][Branch1][C][O][C][C@@][Ring1][=N][Ring1][=Branch2][C][C@@H1][Ring2][Ring1][C][C]

The molecule is a diterpenoid that is ent-cassa-12,15-diene in which the hydrogen at position 2beta has been replaced by a hydroxy group. It has a role as a plant metabolite. It is a diterpenoid and a secondary alcohol. It derives from a hydride of an ent-cassa-12,15-diene.

SMILES: C=CC1=CCC2C(CCC3C(C)(C)CC(O)CC23C)C1C
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@H1][Branch2][Ring2][#Branch2][O][C@H1][C@H1][Branch1][C][O][C@@H1][Branch1][C][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][O][C@@H1][Ring2][Ring1][Ring2][C][O][C@H1][Branch1][C][O][C@@H1][Branch1][C][O][C@@H1][Ring2][Ring1][#C][O]

The molecule is a maltotriose trisaccharide in which the glucose residue at the reducing end is in the pyranose form. It is a maltotriose trisaccharide and a glucotriose.

SMILES: OCC1OC(OC2C(CO)OC(OC3C(CO)OC(O)C(O)C3O)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@@H1][Branch1][=C][/C][=C][/C][C][C][C][C][C][C][=Branch1][C][=O][O][O][O]

The molecule is a hydroperoxy fatty acid that is the (10S)-hydroperoxy derivative of (8E)-octadecenoic acid. It is a conjugate acid of an (8E,10S)-10-hydroperoxy-8-octadecenoate.

SMILES: CCCCCCCCC(C=CCCCCCCC(=O)O)OO
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][=Branch1][C][=O][/C][=C][/C@H1][C@H1][Branch1][C][O][C][C][=Branch1][C][=O][C@@H1][Ring1][#Branch1][C][/C][=C][\C][C][C][C][=Branch1][C][=O][O]

The molecule is a prostaglandins E. It derives from a prostaglandin E2. It is a conjugate acid of a 15-dehydro-prostaglandin E2(1-).

SMILES: CCCCCC(=O)C=CC1C(O)CC(=O)C1CC=CCCCC(=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][C][=C][C][C][C@@H1][Branch1][C][C][C@H1][C][C][C@H1][C][=C][Branch1][=Branch2][C][C][C@][Ring1][=Branch2][Ring1][=Branch1][C][C@@][Branch1][C][C][C][C][C@H1][Branch1][C][O][C][Branch1][=Branch1][C][=Branch1][C][=O][O][C@@H1][Ring1][O][C][C][Ring2][Ring1][Ring1]

The molecule is a steroid acid, the 4-carboxy derivative of zymosterol. It is a steroid acid, a 3beta-sterol and a monocarboxylic acid. It derives from a zymosterol. It is a conjugate acid of a 4-carboxyzymosterol(1-).

SMILES: CC(C)=CCCC(C)C1CCC2C3=C(CCC21C)C1(C)CCC(O)C(C(=O)O)C1CC3
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][=Branch1][C][=O][N][Branch1][=N][C][=C][Branch1][C][C][C][=C][C][=C][Ring1][#Branch1][C][C][Branch1][C][C][C][=Branch1][C][=O][O][C]

The molecule is an alanine derivative that is methyl alaninate in which one of the hydrogens attached to the nitrogen is substituted by a methoxyacetyl group, while the other is substituted by a 2,6-dimethylphenyl group. It is an alanine derivative, an aromatic amide, a carboxamide, an ether and a methyl ester.

SMILES: COCC(=O)N(c1c(C)cccc1C)C(C)C(=O)OC
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@@H1][Branch1][C][O][C@@H1][Branch1][C][O][C][C][C][C][C][C][C][C][=Branch1][C][=O][O]

The molecule is a hydroxy fatty acid that is octadecanoic acid carrying two hydroxy substituents at positions 9 and 10. It is a dihydroxy monocarboxylic acid and a hydroxyoctadecanoic acid. It derives from an octadecanoic acid. It is a conjugate acid of a (9S,10R)-dihydroxyoctadecanoate. It is an enantiomer of a (9R,10S)-dihydroxyoctadecanoic acid.

SMILES: CCCCCCCCC(O)C(O)CCCCCCCC(=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][=Branch1][Ring2][=C][Ring1][=Branch1][NH1][C][=C][N][=C][C][=C][Ring1][=Branch1][Ring1][#Branch2]

The molecule is the parent compound of the beta-carbolines, a tricyclic structure comprising an indole ring system ortho- fused to C-3 and C-4 of a pyridine ring. It has a role as a marine metabolite and a fungal metabolite. It is a member of beta-carbolines and a mancude organic heterotricyclic parent.

SMILES: c1ccc2c(c1)[nH]c1cnccc12
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][C@H1][Branch1][C][O][O][C][=C][Branch1][#Branch1][C][=Branch1][C][=O][O][C][C@H1][Ring1][O][C][C@@H1][NH2+1][C][C][C][=C][Ring1][=Branch1][NH1][C][=C][C][=C][C][=C][Ring1][=Branch2][Ring1][=Branch1]

The molecule is conjugate acid of strictosidine aglycone arising from deprotonation of the secondary amino group; major species at pH 7.3. It is an organic cation and an ammonium ion derivative. It is a conjugate acid of a strictosidine aglycone.

SMILES: C=CC1C(O)OC=C(C(=O)OC)C1CC1[NH2+]CCc2c1[nH]c1ccccc21
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][Ring1][Ring1][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O]

The molecule is a 2-oxo monocarboxylic acid that is pyruvic acid in which one of the methyl hydrogens has been replaced by a methylenecyclopropyl group. It has a role as a rat metabolite and a xenobiotic metabolite. It is a 2-oxo monocarboxylic acid, a member of cyclopropanes and an olefinic compound. It derives from a pyruvic acid.

SMILES: C=C1CC1CC(=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>

[Cl].[O][C][=C][C][=C][C][=C][Ring1][=Branch1][/C][=C][/C][=C][C][=C][C][=C][C][=C][C][Ring1][=Branch1][=N][Ring1][#Branch2]

The molecule is a hydrochloride salt resulting from the formal reaction of equimolar amounts of quininib and hydrogen chloride. It is an anti-angiogenic compound that exerts a dose-dependent antagonism of the cysteinyl leukotriene pathway, preferentially antagonising cysteinyl leukotriene receptor 1. It has a role as an angiogenesis inhibitor. It contains a quininib(1+).

SMILES: Cl.Oc1ccccc1C=Cc1ccc2ccccc2n1
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][Branch2][Branch1][=Branch2][C][O][P][=Branch1][C][=O][Branch1][C][O][O][P][=Branch1][C][=O][Branch1][C][O][O][C][C@H1][O][C@@H1][Branch1][P][N][C][=N][C][=C][Branch1][C][N][N][=C][N][=C][Ring1][#Branch1][Ring1][#Branch2][C@H1][Branch1][C][O][C@@H1][Ring1][S][O][P][=Branch1][C][=O][Branch1][C][O][O][C@@H1][Branch1][C][O][C][=Branch1][C][=O][N][C][C][C][=Branch1][C][=O][N][C][C][S][C][=Branch1][C][=O][/C][=C][/C][=C][C][=C][Branch1][C][O][C][=C][Ring1][#Branch1]

The molecule is the S-(4-coumaroyl) derivative of coenzyme A. It is a 2-enoyl-CoA and a monounsaturated fatty acyl-CoA. It derives from a 4-coumaric acid and a cinnamoyl-CoA. It is a conjugate acid of a 4-coumaroyl-CoA(4-).

SMILES: CC(C)(COP(=O)(O)OP(=O)(O)OCC1OC(n2cnc3c(N)ncnc32)C(O)C1OP(=O)(O)O)C(O)C(=O)NCCC(=O)NCCSC(=O)C=Cc1ccc(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@@H1][C][C][=Branch1][C][=O][N][C@H1][Branch1][=Branch1][C@@H1][Branch1][C][C][O][C][=Branch1][C][=O][N][C@H1][Branch1][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][=N][C][C][=C][C][=C][Branch1][C][O][C][=C][Ring1][#Branch1][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch1][C][Branch1][C][C][C][C][=Branch1][C][=O][N][C][C@H1][Branch1][C][O][C][C@H1][Ring1][=Branch1][C][=Branch1][C][=O][N][C@H1][Branch1][=Branch1][C@@H1][Branch1][C][C][O][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch1][C@@H1][Branch1][C][C][O][C][=Branch1][C][=O][N][C][C][C@H1][Branch1][C][O][C@H1][Ring1][=Branch1][C][=Branch1][C][=O][N][C@@H1][Branch1][O][C@H1][Branch1][C][O][C][C][Branch1][C][N][=O][C][=Branch1][C][=O][N][C][C][=Branch1][C][=O][N][C@H1][Branch1][=Branch1][C@@H1][Branch1][C][C][O][C][=Branch1][C][=O][N][C@@H1][Branch1][Branch1][C][C][C][N][C][=Branch1][C][=O][O][Ring2][#Branch1][#C]

The molecule is a 40-membered macrocyclic cyclodepsipeptide that consists of a 3-hydroxypalmitoyl moiety linked to a peptide sequence of 12 amino acids and cyclised head-to-tail. It is isolated from an unidentified Fungus and exhibits antifungal activity. It has a role as an antifungal agent. It is a cyclodepsipeptide, a member of phenols, a member of pyrrolidines and a macrocycle. It derives from a 3-hydroxypalmitic acid. It is a conjugate base of a FR901469(1+).

SMILES: CCCCCCCCCCCCCC1CC(=O)NC(C(C)O)C(=O)NC(C)C(=O)NC(Cc2ccc(O)cc2)C(=O)NC(C(C)C)C(=O)N2CC(O)CC2C(=O)NC(C(C)O)C(=O)NC(C(C)O)C(=O)N2CCC(O)C2C(=O)NC(C(O)CC(N)=O)C(=O)NCC(=O)NC(C(C)O)C(=O)NC(CCCN)C(=O)O1
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][Ring1][C][S][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-cysteine, L-aspartic acid and glycine joined in sequence by peptide linkages. It derives from a L-cysteine, a L-aspartic acid and a glycine.

SMILES: NC(CS)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>

[C][C][=Branch1][C][=O][C][=N][C][=C][Branch1][Branch1][N][C][C][O][NH1][C][=Branch1][C][=O][NH1][C][Ring1][O][=O]

The molecule is a nucleobase analogue that is uracil substituted with a (2-hydroxyethyl)amino group at position 6 and an (E)-(2-oxopropylidene)amino group at position 5; one of 20 modifications to the potent microbial riboflavin-based metabolite antigen 5-(2-oxopropylideneamino)-6-D-ribityl aminouracil (5-OP-RU), an activator of mucosal-associated invariant T (MAIT) cells when presented by the MR1 protein (reported in MED:32123373). It has a role as an epitope. It is a pyrimidone and a nucleobase analogue. It derives from a uracil.

SMILES: CC(=O)C=Nc1c(NCCO)[nH]c(=O)[nH]c1=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][=Cr][=Branch1][C][=O][Branch1][C][O][O]

The molecule is a chromium oxoacid. It has a role as an oxidising agent. It is a conjugate acid of a hydrogenchromate.

SMILES: O=[Cr](=O)(O)O