[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][Branch2][Ring2][=Branch2][C][=Branch1][C][=O][C][=C][Branch1][Branch1][C][Ring1][#Branch1][=O][N][C][C@H1][C@@H1][Branch2][Ring1][C][C@@][Ring1][Branch1][Branch1][O][C@@H1][Ring1][#Branch2][C][O][C][=Branch1][C][=O][N][O][C][N][Ring1][N][C][N]"}, {"from": "gpt", "value": "The molecule is an N-methyl derivative of the antineoplastic antibiotic mitomycin C isolated from the bacterium Streptomyces ardus and other Streptomyces bacterial species.  Bioreduced porfiromycin generates oxygen radicals and alkylates DNA, producing interstrand cross-links and single-strand breaks, thereby inhibiting DNA synthesis.  Porfiromycin is preferentially toxic to hypoxic cells. (NCI04)"}]