Synonyms: Azirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione,1,1a,2,8,8a,8b-hexahydro-8a-hydroxy-8-(hydroxymethyl)-6-methoxy-1,5-dimethyl-,8-carbamate (8CI); Azirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione,8-[[(aminocarbonyl)oxy]methyl]-1,1a,2,8,8a,8b-hexahydro-8a-hydroxy-6-methoxy-1,5-dimethyl-,[1aS-(1aa,8a,8aa,8ba)]-; Mitomycin B (7CI)