User: I'm looking for the SMILES of a molecule that can be described as:
The molecule is a cyclic tetrapyrrole anion obtained by deprotonation of the four carboxy groups of coproporphyrin III; major species at pH 7.3. It is a conjugate base of a coproporphyrin III.
Assistant: This is a molecule that fits this description: CC1=C(CCC(=O)[O-])c2cc3nc(cc4[nH]c(cc5[nH]c(cc1n2)c(C)c5CCC(=O)[O-])c(CCC(=O)[O-])c4C)C(CCC(=O)[O-])=C3C
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#}
CC1=C(CCC(=O)[O-])c2cc3nc(cc4[nH]c(cc5[nH]c(cc1n2)c(C)c5CCC(=O)[O-])c(CCC(=O)[O-])c4C)C(CCC(=O)[O-])=C3C
3-[8,13,18-tris(2-carboxylatoethyl)-3,7,12,17-tetramethyl-21,24-dihydroporphyrin-2-yl]propanoate
The molecule is a cyclic tetrapyrrole anion obtained by deprotonation of the four carboxy groups of coproporphyrin III; major species at pH 7.3. It is a conjugate base of a coproporphyrin III.