Indole
(1aS,8aR,8bS)-6,8a-dimethoxy-1,5-dimethyl-8-methylidene-1,1a,2,8,8a,8b-hexahydroazireno[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione
(1aS,8R,8aR,8bS)-6-Amino-8-[[(aminocarbonyl)oxy]methyl]-1,1a,2,8,8a,8b-hexahydro-8a-methoxy-1,5-dimethylazirino[2,3:3,4]pyrrolo[1,2-a]indole-4,7-dione
(1aS,8R,8aR,8bS)-8-[[(Aminocarbonyl)oxy]methyl]-1,1a,2,8,8a,8b-hexahydro-6,8a-dimethoxy-1,5-dimethylazirino[2,3:3,4]pyrrolo[1,2-a]indole-4,7-dione