4055-40-7 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 HSDB 3419 MITOMYCIN B