[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][C][Branch1][C][C][C@@H1][C][=Branch1][C][=O][N][C@@H1][Branch1][Branch2][C][=Branch1][C][=O][N][Ring1][Branch2][C][C][=Branch1][C][=O][N]"}, {"from": "gpt", "value": "The molecule is a member of the class of 2,5-diketopiperazines that is 2,5-diketopiperazine substituted by an (aminocarbonyl)methyl group at position 3 and an isobutyl group at position 6. It is isolated from the fungus Cordyceps sinensis and exhibits significant cytotoxicity against L-929, A375 and HeLa cell lines. It has a role as a metabolite and an antineoplastic agent."}]