User: I'm searching for the SMILES of a molecule that can be described as:
The molecule is a linear tetrapyrrole anion obtained by deprotonation of the two carboxy groups of mycobilin a; major species at pH 7.3. It is a dicarboxylic acid dianion and a linear tetrapyrrole anion. It is a conjugate base of a mycobilin a.
Assistant: This is a molecule that fits your description: C=CC1=C(C)C(/C=c2\[nH]/c(=C\c3[nH]c(C(=O)c4[nH]c(C=O)c(C)c4C=C)c(C)c3CCC(=O)[O-])c(CCC(=O)[O-])c2C)=NC1=O
User: I'm {#searching|looking!} for the {SMILES__description} of a molecule that can be described {#by|as!}:
{description#}
Assistant: This is a molecule that fits {#your|this!} description: {SMILES#}
3-[(2Z,5Z)-2-[[3-(2-carboxylatoethyl)-5-(3-ethenyl-5-formyl-4-methyl-1H-pyrrole-2-carbonyl)-4-methyl-1H-pyrrol-2-yl]methylidene]-5-[(4-ethenyl-3-methyl-5-oxopyrrol-2-yl)methylidene]-4-methylpyrrol-3-yl]propanoate
The molecule is a linear tetrapyrrole anion obtained by deprotonation of the two carboxy groups of mycobilin a; major species at pH 7.3. It is a dicarboxylic acid dianion and a linear tetrapyrrole anion. It is a conjugate base of a mycobilin a.