[{"from": "human", "value": "Could you provide a description of this molecule? [C][=C][C][=Branch2][Ring2][Ring2][=C][Branch2][Ring1][#C][C][=C][Ring1][=Branch1][O][C][=C][Branch2][Ring1][Ring2][C][=C][Branch1][=Branch1][C][=C][Ring1][=Branch1][I][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][I][I][O]"}, {"from": "gpt", "value": "The molecule is the amino acid zwitterion formed from 3,3',5-triiodo-L-thyronine by tranfer of a proton from the carboxy group to the amino group. It is the major species at pH 7.3. It has a role as a human metabolite. It is a tautomer of a 3,3',5-triiodo-L-thyronine."}]