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

The molecule is l-Cysteine substituted at nitrogen by an acetyl group and at sulfur by a substituted-lactam carbonyl group. It is a lactam and a S-substituted L-cysteine.

SMILES: CC(=O)NC(CSC(=O)C1(C(O)C(C)C)NC(=O)C(C)C1O)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][Branch1][C][C][C][=Branch1][C][=O][S][C][C][N][C][=Branch1][C][=O][C][C][N][C][=Branch1][C][=O][C@H1][Branch1][C][O][C][Branch1][C][C][Branch1][C][C][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O][P][=Branch1][C][=O][Branch1][C][O-1][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-1][O-1]

The molecule is an acyl-CoA(4-) that is the tetraanion of isobutyryl-CoA, arising from deprotonation of phosphate and diphosphate functions. It has a role as a human metabolite. It is a conjugate base of an isobutyryl-CoA.

SMILES: CC(C)C(=O)SCCNC(=O)CCNC(=O)C(O)C(C)(C)COP(=O)([O-])OP(=O)([O-])OCC1OC(n2cnc3c(N)ncnc32)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>

[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O][C][Branch1][=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 FAHFA obtained by formal condensation of the carboxy group of palmitic acid with the hydroxy group of 5-hydroxystearic acid. It has a role as a human metabolite, an anti-inflammatory agent and a hypoglycemic agent. It is a FAHFA and a long-chain fatty acid. It derives from a hexadecanoic acid and an octadecanoic acid. It is a conjugate acid of a 5-PAHSA(1-).

SMILES: CCCCCCCCCCCCCCCC(=O)OC(CCCCCCCCCCCCC)CCCC(=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][Branch2][Ring2][S][C][C][C][C@@H1][Branch1][C][C][C@H1][C][C][C@H1][C@@H1][C@H1][Branch1][C][O][C][C@@H1][C][C@H1][Branch1][C][O][C][C][C@][Ring1][#Branch1][Branch1][C][C][C@H1][Ring1][=N][C][C@H1][Branch1][C][O][C@][Ring2][Ring1][Branch1][Ring2][Ring1][C][C][C][=Branch1][C][=O][S][C][C][N][C][=Branch1][C][=O][C][C][N][C][=Branch1][C][=O][C@H1][Branch1][C][O][C][Branch1][C][C][Branch1][C][C][C][O][P][=Branch1][C][=O][Branch1][C][O][O]

The molecule is an S-acyl-4'-phosphopantetheine obtained by formal condensation of the thiol group of D-pantetheine 4'-phosphate with the carboxy group of 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-oic acid. It has a role as a mouse metabolite. It derives from a 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-oic acid. It is a conjugate acid of a S-(3alpha,7alpha,12alpha-trihydroxy-5beta-cholestan-26-oyl)-4'-phosphopantetheine(2-).

SMILES: CC(CCCC(C)C1CCC2C3C(O)CC4CC(O)CCC4(C)C3CC(O)C12C)C(=O)SCCNC(=O)CCNC(=O)C(O)C(C)(C)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>

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

The molecule is a trisaccharide consisting of three mannopyranose residues linked beta(1->2), of which the residue at the non-reducing end is dehydroxylated at C-4.

SMILES: OCC1CC(O)C(O)C(OC2C(OC3C(O)OC(CO)C(O)C3O)OC(CO)C(O)C2O)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>

[C][C@H1][Branch2][Branch1][Ring2][O][P][=Branch1][C][=O][Branch1][C][O-1][O][P][=Branch1][C][=O][Branch1][C][O-1][O][C][C@H1][O][C@@H1][Branch2][Ring1][Ring2][N][C][=N][C][C][=Branch1][C][=O][NH1][C][Branch1][C][N][=N][C][=Ring1][Branch2][Ring1][O][C@H1][Branch1][C][O][C@@H1][Ring1][P][O][C][=Branch1][C][=O][O-1]

The molecule is the trianion obtained by removal of protons from the carboxylic acid and phosphate groups of L-lactyl-2-diphospho-5'-guanosine. It is a carboxylic acid trianion and an organophosphate oxoanion. It is a conjugate base of a L-lactyl-2-diphospho-5'-guanosine.

SMILES: CC(OP(=O)([O-])OP(=O)([O-])OCC1OC(n2cnc3c(=O)[nH]c(N)nc32)C(O)C1O)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>

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

The molecule is a deoxyketohexose that is keto-D-fructose that is lacking the hydroxy group at position 3. A metabolite of 3-deoxyglucosone, a dicarbonyl sugar synthesised through the Maillard reaction. It is a hexanone, an alpha-hydroxy ketone, a deoxyketohexose and a beta-hydroxy ketone.

SMILES: O=C(CO)CC(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>

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

The molecule is a naphthylacetic acid substituted by a carboxymethyl group at position 1. It has a role as a synthetic auxin.

SMILES: O=C(O)Cc1cccc2ccccc12
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@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][C@@H1][Ring1][O][C][C][Ring2][Ring1][Ring1]

The molecule is a steroid acid anion that is the conjugate base of 4alpha-carboxyzymosterol, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a 3beta-hydroxy steroid and 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>

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

The molecule is an arabinonic acid derivative that is L-arabinonic acid carrying a single phospho substituent at position 5. It is a phospho sugar and an arabinonic acid derivative. It derives from a L-arabinonic acid. It is a conjugate acid of a 5-phospho-L-arabinonate(3-).

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

The molecule is an N-acetyl-L-amino acid consisting of L-2-aminoadipic acid carrying an N-acetyl substituent. It has a role as a human metabolite. It is a conjugate acid of a N-acetyl-L-2-aminoadipate(2-).

SMILES: CC(=O)NC(CCCC(=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>

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

The molecule is a member of phenols and an imidazopyrazine. It has a role as a luciferin. It derives from a hydride of an imidazo[1,2-a]pyrazine.

SMILES: Oc1ccc(-c2cn3c(O)c(Cc4ccccc4)nc3c(Cc3ccccc3)n2)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][Branch1][C][C][C][C][C][C][C][C][C][C][C][C][/C][=C][\C][=Branch1][C][=O][O]

The molecule is an alpha,beta-unsaturated monocarboxylic acid that is cis-2-pentadecenoic acid in which one of the hydrogens at position 14 has been replaced by a methyl group. It is a monounsaturated fatty acid, an alpha,beta-unsaturated monocarboxylic acid and a long-chain fatty acid.

SMILES: CC(C)CCCCCCCCCCC=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][Branch1][Ring1][O][C][C][=Branch1][C][=O][N][C][=C][C][Branch1][Ring1][O][C][=C][Branch1][Ring1][O][C][C][=C][Ring1][#Branch2][C][=Branch1][C][=O][O][C@H1][C][C@H1][Branch2][Branch2][#Branch1][O][C@@H1][C][=Branch1][C][=O][C][Branch1][Branch2][N][C][=Branch1][C][=O][O][C][=C][/C][=Branch1][#Branch1][=C][\C][S][S][S][C][C@][Ring2][Ring1][C][Branch1][C][O][C][#C][/C][=C][\C][#C][C@H1][Ring1][P][O][C@@H1][O][C@H1][Branch1][C][C][C@@H1][Branch2][Ring1][Branch1][N][O][C@H1][C][C@H1][Branch1][C][O][C@H1][Branch1][Ring1][S][C][C@@H1][Branch1][C][C][O][Ring1][#Branch2][C@H1][Branch1][C][O][C@H1][Ring2][Ring1][Ring2][O][C@H1][C][C@H1][Branch1][Ring1][O][C][C@@H1][Branch1][#Branch1][N][C][Branch1][C][C][C][C][O][Ring1][N][O][C@@H1][Branch1][C][C][C@H1][Ring2][=Branch1][Ring2][O]

The molecule is a naturally occurring antibiotic and antitumor agent isolated from Actinomadura verrucosopora. Its chemical structure consists of a core bicyclo[7.3.1]tridecadiynene moiety containing a 1,5-diyn-3-ene as part of a ten-membered ring, a alpha,beta-unsaturated ketone with a bridgehead double bond and an attached allylic trisulfide. This ring system is attached at one end by a trisaccharide moiety and at the opposite end by a 2-deoxy-L-fucose-anthranilate moiety. The trisaccharide consists of a hydroxyamino sugar which is connected to a isopropylamino sugar through a glycosidic linkage and a thiomethyl sugar through an NH-O linkage. It has a role as an antineoplastic agent and an alkylating agent.

SMILES: C=C(OC)C(=O)Nc1cc(OC)c(OC)cc1C(=O)OC1CC(OC2C(=O)C(NC(=O)OC)=C3C(=CCSSSC)C2(O)C#CC=CC#CC3OC2OC(C)C(NOC3CC(O)C(SC)C(C)O3)C(O)C2OC2CC(OC)C(NC(C)C)CO2)OC(C)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@H1][Branch1][C][O][C][C][C][C][N][C][=Branch1][C][=O][C][=C][Branch1][#Branch1][N][=C][N][Ring1][Branch1][C][N][Branch1][C][C][C][Ring1][N][=O]

The molecule is a 1-(5-hydroxyhexyl)-3,7-dimethyl-3,7-dihydro-1H-purine-2,6-dione that has (S)-configuration. It is the inactive optical enantiomer of (R)-lisofylline, an anti-inflammatory agent. It is an enantiomer of a (R)-lisofylline.

SMILES: CC(O)CCCCn1c(=O)c2c(ncn2C)n(C)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>

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

The molecule is a N-acyl-4-hydroxy-15-methylhexadecasphinganine in which the acyl group has 25 carbons and 0 double bonds and is 2-hydroxylated. It derives from a 15-methylhexadecaphytosphingosine.

SMILES: CCCCCCCCCCCCCCCCCCCCCCCC(O)C(=O)NC(CO)C(O)C(O)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][C][C][C][C][C][C][C][C][C][C][C][C][C][C][O][C][C@H1][Branch2][Ring1][Branch1][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O][C][C][N+1][Branch1][C][C][Branch1][C][C][C][O][C][=Branch1][C][=O][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C]

The molecule is a 2-acyl-1-alkyl-sn-glycero-3-phosphocholine betaine where the alkyl and the acyl groups at position 1 and 2 are octadecyl and palmitoyl respectively. It derives from a 1-O-octadecyl-sn-glycero-3-phosphocholine and a hexadecanoic acid.

SMILES: CCCCCCCCCCCCCCCCCCOCC(COP(=O)([O-])OCC[N+](C)(C)C)OC(=O)CCCCCCCCCCCCCCC