1H-Azirino(2,3-c)(1)benzazocine-4,7,9(2H)-trione,1a,3,8,9a-tetrahydro-6-amino-8-(((aminocarbonyl)oxy)methyl)-1,3,5-trimethyl-, (1aR-(1a-alpha,8-beta,9a-alpha))- 26792-12-1 7-Amino-N-methylisomitomycin B BRN 0857421 NMMB