Synonyms: 8-(Aminocarbonyloxymethyl)-1,1a,2,8b-tetrahydro-6-methoxy-1,5-dimethylazirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione;8-[[(Aminocarbonyl)oxy]methyl]-1,1a,2,8b-tetrahydro-1,5-dimethyl-6-methoxyazirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione;8-[[(Aminocarbonyl)oxy]methyl]-1,1a,2,8b-tetrahydro-6-methoxy-1,5-dimethylazirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione