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

The molecule is a linear trisaccharide derivative that consists of alpha-L-fucose, 6-sulfated beta-D-galactose and D-glucose units connected in sequence by (1->2) and (1->4) links, respectively. It has a role as an epitope. It is a trisaccharide derivative and an oligosaccharide sulfate.

SMILES: CC1OC(OC2C(OC3C(CO)OC(O)C(O)C3O)OC(COS(=O)(=O)O)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>

[O][=C][Branch1][C][O][/C][=C][/C][=Branch1][C][=O][O].[O][=C][Branch2][Ring1][N][C][=C][C][=C][Branch1][C][F][C][Branch1][C][F][=C][Ring1][Branch2][N][C][=C][C][=C][Branch1][C][I][C][=C][Ring1][#Branch1][F][N][C][C][Branch1][C][O][Branch1][=Branch2][C@@H1][C][C][C][C][N][Ring1][=Branch1][C][Ring1][O].[O][=C][Branch2][Ring1][N][C][=C][C][=C][Branch1][C][F][C][Branch1][C][F][=C][Ring1][Branch2][N][C][=C][C][=C][Branch1][C][I][C][=C][Ring1][#Branch1][F][N][C][C][Branch1][C][O][Branch1][=Branch2][C@@H1][C][C][C][C][N][Ring1][=Branch1][C][Ring1][O]

The molecule is a fumarate salt prepared from cobimetinib by reaction of one molecule of fumaric acid for every two molecules of cobimetinib. An inhibitor of mitogen-activated protein kinase that is used in combination with vemurafenib for the treatment of patients with unresectable or metastatic melanoma. It has a role as an EC 2.7.11.24 (mitogen-activated protein kinase) inhibitor and an antineoplastic agent. It is a fumarate salt and an organoammonium salt. It contains a cobimetinib(1+).

SMILES: O=C(O)C=CC(=O)O.O=C(c1ccc(F)c(F)c1Nc1ccc(I)cc1F)N1CC(O)(C2CCCCN2)C1.O=C(c1ccc(F)c(F)c1Nc1ccc(I)cc1F)N1CC(O)(C2CCCCN2)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][O][C][=Branch1][C][=O][C@@][O][C][C@][C@H1][Branch1][=Branch2][C@@H1][Branch1][C][O][C@@H1][Ring1][Branch2][O][C@@][Branch1][C][C][C@H1][Branch1][C][O][C][=Branch1][C][=O][C][=C][Branch1][C][C][C@@H1][Ring1][#Branch2][C][C@H1][Ring2][Ring1][C][O][C][=Branch1][C][=O][C@H1][Branch1][S][O][C][=Branch1][C][=O][/C][=C][Branch1][C][\C][C][Branch1][C][C][C][C@@H1][Ring2][Ring2][Ring1][Ring2][Ring1][S]

The molecule is a quassinoid natural product found in Brucea antidysenterica consisting of a heteropentacyclic skeleton containing a delta-lactone moiety which is substituted at the alpha-carbon by a (2E)-3,4-dimethylpent-2-enoyloxy group. It shows significant in vitro cytotoxicity towards several human tumour cell lines. It has a role as a metabolite and an antineoplastic agent. It is a pentacyclic triterpenoid, an organic heteropentacyclic compound, an enone, an enoate ester, a delta-lactone, a triol, a cyclic ether, a quassinoid, a methyl ester and a secondary alpha-hydroxy ketone.

SMILES: COC(=O)C12OCC34C(CC5C(C)=CC(=O)C(O)C5(C)C3C(O)C1O)OC(=O)C(OC(=O)C=C(C)C(C)C)C24
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][O][C]

The molecule is a fatty acid methyl ester derived from hexanoic (caproic acid). It has a role as a plant metabolite and a flavouring agent. It is a fatty acid methyl ester and a hexanoate ester.

SMILES: CCCCCC(=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@H1][Branch1][Branch2][C][C][C][=Branch1][C][=O][O][C@H1][C][C][C@H1][C@@H1][C][=Branch1][C][=O][C][C@@H1][C][C][=Branch1][C][=O][C][C][C@][Ring1][#Branch1][Branch1][C][C][C@H1][Ring1][=N][C][C][=Branch1][C][=O][C@][Ring2][Ring1][Branch1][Ring2][Ring1][C][C]

The molecule is an oxo-5beta-cholanic acid in which three oxo substituents are located at positions 3, 7 and 12 on the cholanic acid skeleton. It has a role as a gastrointestinal drug. It is an oxo-5beta-cholanic acid, a 7-oxo steroid, a 12-oxo steroid and a 3-oxo-5beta-steroid. It is a conjugate acid of a 3,7,12-trioxo-5beta-cholan-24-oate.

SMILES: CC(CCC(=O)O)C1CCC2C3C(=O)CC4CC(=O)CCC4(C)C3CC(=O)C12C
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][Branch1][C][C][S][=Branch1][C][=O][=Branch1][C][=O][N][Branch1][#Branch2][S][C][Branch1][C][F][Branch1][C][Cl][Cl][C][=C][C][=C][C][=C][Ring1][=Branch1]

The molecule is a member of the class of sulfamides that is sulfamide in which the hydrogens attached to one of the nitrogens are replaced by methyl groups, while those attached to the other nitrogen are replaced by a phenyl and a [dichloro(fluoro)methyl]sulfanediyl group. A fungicide introduced in 1965 and used in the cultivation of fruit and vegetables, as well as in wood preservatives, it is no longer approved for use in the European Union. It has a role as an acaricide and an antifungal agrochemical. It is a member of sulfamides, an organofluorine compound, an organochlorine compound and a phenylsulfamide fungicide. It derives from a sulfamide.

SMILES: CN(C)S(=O)(=O)N(SC(F)(Cl)Cl)c1ccccc1
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][/N][=C][Branch2][Ring1][N][\C][=Branch1][C][=O][N][C@@H1][C][=Branch1][C][=O][N][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][=C][C][S][C@H1][Ring1][N][Ring1][=Branch2][C][=C][S][C][Branch1][C][N][=N][Ring1][=Branch1]

The molecule is the monocarboxylic acid anion formed by deprotonating ceftizoxime at the carboxyl oxygen. It is a conjugate base of a ceftizoxime.

SMILES: CON=C(C(=O)NC1C(=O)N2C(C(=O)[O-])=CCSC12)c1csc(N)n1
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][P][C][C][C][=C][C][=Branch1][C][=O][C][C][C@@][Ring1][#Branch1][Ring1][O][C][C@@H1][Ring1][S][C][C][C@H1][Ring2][Ring1][Ring1][O][C@@H1][O][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][C@@H1][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Ring1][O][O]

The molecule is a steroid glucuronide anion that is the conjugate base of epitestosterone 17-O-(beta-D-glucuronide) arising from deprotonation of the carboxylic acid function; major species at pH 7.3. It is a steroid glucosiduronic acid anion and a beta-D-glucosiduronate. It derives from an epitestosterone. It is a conjugate base of an epitestosterone 17-O-(beta-D-glucuronide).

SMILES: CC12CCC(=O)C=C1CCC1C2CCC2(C)C(OC3OC(C(=O)[O-])C(O)C(O)C3O)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][N][C][=C][Branch2][Ring1][Branch1][O][C][=Branch1][C][=O][N][Branch1][=Branch2][C][=C][C][=C][C][=N][Ring1][=Branch1][C][Ring1][=N][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][S][Ring2][Ring1][=Branch1][=Branch1][C][=O][=O]

The molecule is an organic heterotricyclic compound that is 2H,5H-[1,3]oxazino[5,6-c][1,2]benzothiazine-2,4(3H)-dione 6,6-dioxide substituted at positions 3 and 5 by pyridin-2-yl and methyl groups respectively. A prodrug of piroxicam, it is used for the relief of pain and inflammation in musculoskeletal disorders such as rheumatoid arthritis and osteoarthritis. It has a role as a prodrug, a non-steroidal anti-inflammatory drug, a cyclooxygenase 1 inhibitor, a non-narcotic analgesic, a platelet aggregation inhibitor and a hepatotoxic agent. It is a member of pyridines and an organic heterotricyclic compound. It derives from a piroxicam.

SMILES: CN1c2c(oc(=O)n(-c3ccccn3)c2=O)-c2ccccc2S1(=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][=Branch1][C][=O][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]

The molecule is a phosphatidylcholine 13:0 in which the acyl groups at positions 1 and 2 are specified as heptanoyl and hexanoyl respectively. It derives from a heptanoic acid and a hexanoic acid.

SMILES: CCCCCCC(=O)OCC(COP(=O)([O-])OCC[N+](C)(C)C)OC(=O)CCCCC
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][=C][\C][/C][=C][\C][/C][=C][\C][C][C][C][=Branch1][C][=O][O]

The molecule is a HETE that is (5Z,8Z,11Z,13E)-15-hydroxyicosa-5,8,11,13-tetraenoic acid bearing a hydroxy substituent at position 15. It has a role as a mouse metabolite. It derives from an icosa-5,8,11,13-tetraenoic acid. It is a conjugate acid of a (5Z,8Z,11Z,13E)-15-HETE(1-).

SMILES: CCCCCC(O)C=CC=CCC=CCC=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][=O][N][C@H1][C@@H1][Branch2][#Branch1][#C][O][P][=Branch1][C][=O][Branch1][C][O-1][O][P][=Branch1][C][=O][Branch1][C][O-1][O][C][/C][=C][Branch1][C][/C][C][C][/C][=C][Branch1][C][/C][C][C][/C][=C][Branch1][C][/C][C][C][/C][=C][Branch1][C][/C][C][C][/C][=C][Branch1][C][/C][C][C][/C][=C][Branch1][C][/C][C][C][/C][=C][Branch1][C][/C][C][C][/C][=C][Branch1][C][/C][C][C][/C][=C][Branch1][C][\C][C][C][/C][=C][Branch1][C][\C][C][C][C][=C][Branch1][C][C][C][O][C@H1][Branch1][Ring1][C][O][C@@H1][Branch1][C][O][C@@H1][Ring2][=Branch1][=Branch2][O][C@H1][Branch1][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][C][C][C][=Branch1][C][=O][N][C@H1][Branch2][Ring2][#Branch1][C][C][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch1][C][C][C][C][NH3+1][C][=Branch1][C][=O][N][C@H1][Branch1][C][C][C][=Branch1][C][=O][N][C@H1][Branch1][C][C][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]

The molecule is the ion of overall charge -3 formed from undecaprenyldiphospho-N-acetylmuramoyl-L-alanyl-D-gamma-glutamyl-L-lysyl-D-alanyl-D-alanine at pH 7.3. It is a conjugate base of an undecaprenyldiphospho-N-acetylmuramoyl-L-alanyl-D-gamma-glutamyl-L-lysyl-D-alanyl-D-alanine.

SMILES: CC(=O)NC1C(OP(=O)([O-])OP(=O)([O-])OCC=C(C)CCC=C(C)CCC=C(C)CCC=C(C)CCC=C(C)CCC=C(C)CCC=C(C)CCC=C(C)CCC=C(C)CCC=C(C)CCC=C(C)C)OC(CO)C(O)C1OC(C)C(=O)NC(C)C(=O)NC(CCC(=O)NC(CCCC[NH3+])C(=O)NC(C)C(=O)NC(C)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>

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

The molecule is the (R)-enantiopmer of nipecotic acid. It is an enantiomer of a (S)-nipecotic acid. It is a tautomer of a (R)-nipecotic acid zwitterion.

SMILES: O=C(O)C1CCCNC1
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][Branch2][Ring1][C][C][C][C@@H1][C][C@@H1][Branch1][C][O][C][C][C@@][Ring1][#Branch1][Ring1][O][C][=O][C@@][Ring1][P][Branch1][C][O][C][C@H1][Branch1][C][O][C@@H1][Ring2][Ring1][=Branch1][C][=C][C][=Branch1][C][=O][O][C][Ring1][=Branch1]

The molecule is a 3beta-hydroxy steroid, a 14beta-hydroxy steroid, a 16beta-hydroxy steroid, a 19-oxo steroid and a steroid aldehyde. It derives from a hydride of a 5beta-cardanolide.

SMILES: CC12CCC3C(CCC4CC(O)CCC43C=O)C1(O)CC(O)C2C1=CC(=O)OC1
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][\O][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][#Branch2]

The molecule is a gamma-lactone that is phthalide substituted by a butylidene group at position 3. Isolated from Ligusticum porteri, it exhibits hypoglycemic activity. It has a role as a metabolite, a hypoglycemic agent and an EC 3.2.1.20 (alpha-glucosidase) inhibitor. It is a member of 2-benzofurans and a gamma-lactone. It derives from a 2-benzofuran-1(3H)-one.

SMILES: CCCC=C1OC(=O)c2ccccc21
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][C][/C][=C][/C][=Branch1][C][=O][O]

The molecule is an (omega-1)-hydroxy fatty acid that is trans-2-decenoic acid in which the hydrogen at the 9-pro-R position is replaced by a hydroxy group. It is a medium-chain fatty acid, an (omega-1)-hydroxy fatty acid, an alpha,beta-unsaturated monocarboxylic acid and a hydroxy monounsaturated fatty acid.

SMILES: CC(O)CCCCCC=CC(=O)O