[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=C][Branch2][=Branch1][O][C][=Branch1][C][=O][C][C@][Branch2][Branch1][P][C@H1][Ring1][#Branch1][C][C@@H1][C@][C@@H1][Ring1][=Branch1][C@H1][Branch2][Branch1][Ring1][C@@H1][Branch2][Ring2][=C][C@][Branch2][Ring1][=N][C@@H1][Ring1][=Branch1][C@H1][Branch1][Branch2][C][=Branch1][C][=O][O][Ring1][O][O][C][=Branch1][C][=O][C][=C][Branch1][C][C][C][Branch1][C][C][C][Branch1][=Branch1][O][C][Ring2][Ring1][Branch1][C][=Branch1][C][=O][O][C][O][O][C][O]"}, {"from": "gpt", "value": "The molecule is a triterpene quassinoid antineoplastic antibiotic isolated from the plant Brucea antidysenterica.  Bruceantin inhibits the peptidyl transferase elongation reaction, resulting in decreased protein and DNA synthesis.  Bruceantin also has antiamoebic and antimalarial activity. (NCI04)"}]