User: I'm looking for the SMILES of a molecule that can be described as:
The molecule is the intermediate in the biosynthesis of vitamin B12 from uroporphyrinogen III in which six methyl groups have been introduced into the tetrapyrrole framework, together with ring contraction and reduction. It is a conjugate acid of a precorrin-6Y(6-).
Assistant: This is a molecule that fits your description: C[C@@]1(CC(=O)O)C2=NC(=C1CCC(=O)O)C[C@]1(C)N=C(/C=C3\N[C@H]([C@H](CC(=O)O)[C@@]3(C)CCC(=O)O)[C@]3(C)N/C(=C\2)[C@@H](CCC(=O)O)[C@]3(C)CC(=O)O)C(CCC(=O)O)=C1CC(=O)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-[(1R,2S,3S,4Z,7S,11S,15Z,17R,18R,19R)-8,13,17-tris(2-carboxyethyl)-2,7,12,18-tetrakis(carboxymethyl)-1,2,7,11,17-pentamethyl-3,10,18,19,21,24-hexahydrocorrin-3-yl]propanoic acid
The molecule is the intermediate in the biosynthesis of vitamin B12 from uroporphyrinogen III in which six methyl groups have been introduced into the tetrapyrrole framework, together with ring contraction and reduction. It is a conjugate acid of a precorrin-6Y(6-).