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

The molecule is a dihydroxy-5beta-cholanic acid that is chenodeoxycholic acid carrying an additional ethyl substituent at the 6alpha-position. A semi-synthetic bile acid which acts as a farnesoid X receptor agonist and is used for treatment of primary biliary cholangitis. It has a role as a farnesoid X receptor agonist and a hepatoprotective agent. It is a dihydroxy-5beta-cholanic acid, a 3alpha-hydroxy steroid and a 7alpha-hydroxy steroid. It derives from a chenodeoxycholic acid.

SMILES: CCC1C(O)C2C3CCC(C(C)CCC(=O)O)C3(C)CCC2C2(C)CCC(O)CC12
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][=S][Branch1][C][O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Na+1].[Na+1]

The molecule is an inorganic sodium salt composed of sodium and disulfite ions in a 2:1 ratio. It has a role as a food antioxidant. It contains a disulfite.

SMILES: O=S([O-])S(=O)(=O)[O-].[Na+].[Na+]
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][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][Branch1][#Branch1][C][C][=Branch1][C][=O][O][=C][N][Ring1][#Branch2][C][=Branch1][C][=O][C][=C][C][=C][Branch1][C][Cl][C][=C][Ring1][#Branch1]

The molecule is indole-3-acetic acid substituted on nitrogen with a 4-chlorobenzoyl group and at C-5 by a methoxy group. It is a member of indole-3-acetic acids, a N-acylindole and a member of monochlorobenzenes.

SMILES: COc1ccc2c(c1)c(CC(=O)O)cn2C(=O)c1ccc(Cl)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][=O][N][C@H1][C@H1][Branch2][Ring1][Branch1][O][C][C@H1][O][C@@H1][Branch1][C][O][C@H1][Branch1][C][O][C@@H1][Branch1][C][O][C@H1][Ring1][=Branch2][O][O][C@H1][Branch1][Ring1][C][O][C@@H1][Branch2][Ring1][Branch1][O][C@@H1][O][C@H1][Branch1][Ring1][C][O][C@H1][Branch1][C][O][C@H1][Branch1][C][O][C@H1][Ring1][#Branch2][O][C@@H1][Ring2][Ring1][S][O]

The molecule is an amino trisaccharide that consists of a galactopyranose residue attached by a beta-(1->4)-linkage to an N-acetylglucosamine residue, that is in turn attached to a second galactopyranose by a beta-(1->6)-linkage. It is an amino trisaccharide and a glucosamine oligosaccharide.

SMILES: CC(=O)NC1C(OCC2OC(O)C(O)C(O)C2O)OC(CO)C(OC2OC(CO)C(O)C(O)C2O)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>

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

The molecule is an L-lysine derivative in which one of the amino hydrogens at N(6)-amino is substituted by a 6-[(2S)-2-amino-2-carboxyethyl]-3,4-dioxocyclohexa-1,5-dien-1-yl group. It is a L-lysine derivative, a L-tyrosine derivative, a non-proteinogenic L-alpha-amino acid and a member of 1,2-benzoquinones.

SMILES: NC(CCCCNC1=CC(=O)C(=O)C=C1CC(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][C][Branch1][C][C][/C][=Branch1][#Branch1][=C][/C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]

The molecule is the 2-isopropyl derivative of maleic acid. It has a role as an Escherichia coli metabolite. It derives from a maleic acid. It is a conjugate acid of a 2-isopropylmaleate(2-).

SMILES: CC(C)C(=CC(=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>

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

The molecule is an L-serine derivative that is the ester obtained by formal condensation of the carboxy group of L-serine with the 3'-hydroxy group of AMP. It has a role as a Mycoplasma genitalium metabolite. It is an adenosine 5'-phosphate, a L-serine derivative, an alpha-amino acid ester and a purine ribonucleoside 5'-monophosphate. It derives from an adenosine 5'-monophosphate.

SMILES: Nc1ncnc2c1ncn2C1OC(COP(=O)(O)O)C(OC(=O)C(N)CO)C1O
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

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

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

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

The molecule is a dihydroxyanthraquinone that is anthracene-9,10-dione substituted by hydroxy groups at positions 1 and 5. It derives from a hydride of an anthracene.

SMILES: O=C1c2cccc(O)c2C(=O)c2cccc(O)c21
You are a professional chemist. Your task is to generate a natural, concise, and chemically accurate description of a given molecule.

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

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

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

The molecule is a member of the class of condensed ureas that is the compound formed by the condensation of two molecules of urea; the parent compound of the biuret group of compounds. Used as a non-protein nitrogen source in ruminant feed.

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

The molecule is an optically active form of threonine having D-configuration. It has a role as a Saccharomyces cerevisiae metabolite. It is a threonine and a D-alpha-amino acid. It is a conjugate base of a D-threoninium. It is a conjugate acid of a D-threoninate. It is an enantiomer of a L-threonine. It is a tautomer of a D-threonine zwitterion.

SMILES: CC(O)C(N)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][Branch1][C][Cl][=C][/C][=Branch1][C][=O][C][Branch1][C][Cl][C][=Branch1][C][=O][O]

The molecule is an alpha,omega-dicarboxylic acid that is hexanedioic acid containing a double bond between positions 2 and 3, an oxo group at position 4, and two chlorine atoms (at positions 2 and 5). It is an oxo dicarboxylic acid, an alpha,omega-dicarboxylic acid and an organochlorine compound. It derives from a 4-oxohex-2-enedioic acid. It is a conjugate acid of a 2,5-dichloro-4-oxohex-2-enedioate(2-).

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

The molecule is a member of the class of guanidines that is used (as its trihydrate) for the treatment of acute uncomplicated influenza in patients 18 years and older who have been symptomatic for no more than two days. It has a role as an antiviral drug and an EC 3.2.1.18 (exo-alpha-sialidase) inhibitor. It is a member of cyclopentanols, a member of acetamides, a member of guanidines and a 3-hydroxy monocarboxylic acid. It contains a peramivir hydrate.

SMILES: CCC(CC)C(NC(C)=O)C1C(N=C(N)N)CC(C(=O)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][Branch1][C][O][C][=C][C][=C][Branch1][C][O][C][Branch1][C][O][=C][Ring1][Branch2]

The molecule is a catechol that is the 3,4-dihydroxy derivative of mandelic acid; a metabolite of L-dopa. It has a role as an antioxidant, a drug metabolite, a human metabolite and a mouse metabolite. It is a 2-hydroxy monocarboxylic acid and a member of catechols. It derives from a mandelic acid. It is a conjugate acid of a 3,4-dihydroxymandelate.

SMILES: O=C(O)C(O)c1ccc(O)c(O)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][C][C@H1][C][Branch1][C][C][Branch1][C][C][C@@H1][Branch1][C][O][C][C][C@][Ring1][=Branch2][Branch1][C][C][C@H1][Ring1][=C][C][C][C@H1][C][Branch1][C][C][=C][C][C@H1][C][Branch1][C][C][Branch1][C][C][C@@H1][Branch1][C][O][C][C][C@][Ring1][=C][Ring1][=Branch2][C]

The molecule is a triterpenoid isolated from Lansium domesticum. It has a role as a plant metabolite. It is a triterpenoid, a diol and a member of octahydronaphthalenes.

SMILES: C=C1CCC2C(C)(C)C(O)CCC2(C)C1CCC1C(C)=CCC2C(C)(C)C(O)CCC12C
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][Branch1][C][C][Branch1][C][C][C][=C][C][Branch2][Ring1][Branch1][C][=Branch1][C][=O][N][C][=C][C][=C][Branch1][=Branch1][C][=Branch1][C][=O][O][C][=C][Ring1][=Branch2][=C][C][=C][Ring2][Ring1][C][Ring2][Ring1][=Branch2]

The molecule is an amidobenzoic acid obtained by formal condensation of the carboxy group of (5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-yl)benzoic acid with the anilino group of 4-aminobenzoic acid. A selective RARalpha agonist. It has a role as a retinoic acid receptor alpha/beta agonist and an antineoplastic agent. It is an amidobenzoic acid and a member of tetralins.

SMILES: CC1(C)CCC(C)(C)c2cc(C(=O)Nc3ccc(C(=O)O)cc3)ccc21
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+1][Branch1][C][C][Branch1][C][C][C][C][O][P][=Branch1][C][=O][Branch1][C][O-1][O-1]

The molecule is the organophosphate oxoanion formed from choline by removal of two protons from the phosphate group. Major species at pH 7.3. It has a role as a human metabolite and a Saccharomyces cerevisiae metabolite. It is a conjugate base of a phosphocholine.

SMILES: C[N+](C)(C)CCOP(=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][=S][=Branch1][C][=O][Branch1][=N][C][C][=C][C][=C][Branch1][C][O][C][=C][Ring1][#Branch1][C][C][=C][C][=C][Branch1][C][O][C][=C][Ring1][#Branch1]

The molecule is a sulfone compound having two S-4-hydroxybenzyl substituents. Isolated from the tuber of Gastrodia elata, it exhibits inhibitory effect on platelet aggregation. It has a role as a metabolite and a platelet aggregation inhibitor. It is a sulfone and a member of phenols.

SMILES: O=S(=O)(Cc1ccc(O)cc1)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][=Branch1][C][=O][C][=C][Ring1][#Branch1][C][C][C@@H1][C@@H1][Ring1][O][C@@H1][Branch1][C][O][C][C@@][Branch1][C][C][C@H1][Ring1][Branch2][C][C][C@][Ring1][=Branch1][Branch1][C][O][C][=Branch1][C][=O][C][O][S][=Branch1][C][=O][=Branch1][C][=O][O-1]

The molecule is conjugate base of cortisol 21-sulfate arising from deprotonation of the sulfate OH; major species at pH 7.3. It is a conjugate base of a cortisol 21-sulfate.

SMILES: CC12CCC(=O)C=C1CCC1C2C(O)CC2(C)C1CCC2(O)C(=O)COS(=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][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][C][C][C][C][C][C][C][C][C][C][C][C][C][C]

The molecule is a phosphatidylcholine 42:0 in which the acyl groups specified at positions 1 and 2 are docosanoyl and eicosanoyl respectively. It derives from a docosanoic acid and an icosanoic acid.

SMILES: CCCCCCCCCCCCCCCCCCCCCC(=O)OCC(COP(=O)([O-])OCC[N+](C)(C)C)OC(=O)CCCCCCCCCCCCCCCCCCC