The water-soluble duocarmycin B1 prodrugs such as glycoside 3, phosphate 4
and carbamate 5 were synthesized for improving biological and pharmaceutica
l profiles of duocarmycin. Among these prodrugs, N-methylpiperazinylcarbamo
yl derivative 5 exhibited potent antitumor activity against several human t
umors in vivo. (C) 1999 Elsevier Science Ltd. All rights reserved.