[{"from": "human", "value": "Describe this molecule. [C][C@H1][C@@H1][Branch2][=Branch1][=Branch2][C@H1][Branch2][=Branch1][Ring2][C@H1][Branch2][Branch1][=C][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][C][C@@H1][Branch2][Ring2][S][C@][Branch2][Ring2][Branch2][C][C][=C][C][=C][Branch1][#Branch2][C][=Branch1][=Branch1][=C][Ring1][#Branch2][Ring1][=Branch1][O][C][=Branch1][C][=O][C][=C][Branch1][Branch1][C][Ring1][#Branch2][=O][C][=C][Branch1][=Branch1][C][=C][Ring1][Branch2][O][O][C][Branch1][C][C][O][O][C][O][C][O][O]"}, {"from": "gpt", "value": "The molecule is an anthracycline antibiotic that is steffimycin in which the carbonyl group that is adjacent to the carbon bearing both a hydroxy group and a methyl group has been reduced to the corresponding methylene group. An antitumour anthracycline first isolated from Streptomyces steffisburgensis. It has a role as an intercalator, an antineoplastic agent, a bacterial metabolite and an EC 3.4.24.3 (microbial collagenase) inhibitor. It is functionally related to a 2-O-methyl-alpha-L-rhamnose."}]