[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][O][C][=Branch1][C][=O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][C][=Branch1][C][=O][/C][=Branch1][S][=C][\\C][=C][C][=C][Branch1][Ring2][O][Ring1][Branch1][N+1][=Branch1][C][=O][O-1][/C][=Branch1][C][=O][N][Ring1][S]"}, {"from": "gpt", "value": "The molecule is an ethyl ester resulting from the formal condensation of the carboxy group of 4-{4-[(5-nitrofuran-2-yl)methylidene]-3,5-dioxopyrazolidin-1-yl}benzoic acid with ethanol. It is an irreversible and cell-permeable inhibitor of ubiquitin-activating enzyme E1. It has a role as an EC 6.2.1.45 (E1 ubiquitin-activating enzyme) inhibitor and an antineoplastic agent. It is an ethyl ester, a member of furans, a C-nitro compound, a member of pyrazolidines and a benzoate ester."}]