[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][O][C][=Branch1][C][=O][C][=N+1][=N-1]"}, {"from": "gpt", "value": "The molecule is a carboxylic ester resulting from the formal condensation of the carboxy group of diazoacetic acid with the alcoholic hydroxy group of L-serine. An antibiotic produced by a Streptomyces species. It has a role as an antimicrobial agent, an antineoplastic agent, an antifungal agent, an antimetabolite, an immunosuppressive agent, a metabolite and a glutamine antagonist. It is a diazo compound, a carboxylic ester, a L-serine derivative and a non-proteinogenic L-alpha-amino acid."}]