[{"from": "human", "value": "Describe this molecule. [C][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][NH3+1][O]"}, {"from": "gpt", "value": "The molecule is a serinium that is the conjugate acid of L-serine, obtained by protonation of the amino group. It is a conjugate acid of a L-serine. It is an enantiomer of a D-serinium."}]