[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Ring1][#Branch2][C@H1][Branch2][Ring1][Branch1][C@H1][Branch1][S][O][C@H1][Ring1][=Branch1][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][O][O][O][C][C@@H1][Branch1][P][C@H1][Branch1][=N][C@H1][Branch1][=Branch2][C@H1][Branch1][Ring2][O][Ring1][=Branch1][C][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a derivative of L-serine having a 3-O-D-galactosyl-N-acetyl-beta-D-galactosaminyl moiety attached to the side-chain oxygen. It is an O-glycosyl-L-serine and a non-proteinogenic L-alpha-amino acid. It is a tautomer of an O-(3-O-D-galactosyl-N-acetyl-beta-D-galactosaminyl)-L-serine zwitterion."}]