(1-Nitro-2,3-dioxo-2,3,5,6,7a,8,8a,11,13,13a,13b,14-dodecahydro-7,9-methanooxepino[3,4-a]pyrrolo[2,3-d]carbazol-13-yl)acetic acid 561-20-6 AIDS-016483 AIDS016483 Cacotheline NSC5069