Azirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione, 8-[[(aminocarbonyl)oxy]methyl]-1,1a,2,8,8a,8b-hexahydro-6-[(4-hydroxyphenyl)methylamino]-8a-methoxy-5-methyl, [1aR-(1a.alpha.,8.beta.,8a.alpha.,8b.alpha.)]- Azirino[2',3':3,4]pyrrolo[1,2-a]indole-4,7-dione, 8-[[(aminocarbonyl)oxy]methyl]-1,1a,2,8,8a,8b-hexahydro-6-[(4-hydroxyphenyl)methylamino]-8a-methoxy-5-methyl-, [1aR-(1a.alpha.,8.beta.,8a.alpha.,8b.alpha.)]- MITOMYCIN C DERIV NSC364158