... A com- parison of the same features between 8b and 8a were not 0 1989 American Chemical Society Page 2. Synthesis of 9-epi-Mitomycin B J. Org. Chem., Vol. 54, No. 25, 1989 5909 Scheme I11 8a 9 Scheme IV mitomycin B OCH, 2a mitomycin D NH, 3a Figure 1. ...