[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=O][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is an acetyl-L-serine where the acetyl group is attached to the side-chain oxygen. It is an intermediate in the biosynthesis of the amino acid cysteine in bacteria. It has a role as a bacterial metabolite and a Saccharomyces cerevisiae metabolite. It is an acetate ester and an acetyl-L-serine. It is a tautomer of an O-acetyl-L-serine zwitterion."}]