[{"from": "human", "value": "What can you tell me about this molecule? [C][/C][=C][/C][=Branch1][C][=O][O][C@@H1][C][C@H1][Branch2][Ring1][Ring1][O][C][=Branch1][C][=O][C][C][Branch1][Ring2][O][Ring1][Ring1][/C][=C][/C@@H1][Ring1][N][O][C]"}, {"from": "gpt", "value": "The molecule is a 10-membered lactone obtained from 10-methyl-9,10-dihydro-2H-oxecin-2-one by the epoxidation of the double bond at position 3-4 and cis-dihydroxylation of the double bond at position 7-8, with further acylation of the hydroxy group at position 8 by a but-2-enoyl group. Multiplolide B was first isolated from the fungus Xylaria multiplex BCC 1111. It shows antifungal activity against Candida albicans. The epoxide group has cis-configuration, but its configuration relative to the other substituents was not established. It has a role as a metabolite and an antifungal agent. It is a lactone, an epoxide and a secondary alcohol."}]