Patent ID: 8093235

Claim:
A compound of formula I: wherein: each B and E is independently —C(═O)NH—CH(R a )— or —C(═O)—NH—C(═O)—, and each A and D is independently a group of the formula: each R 1 , R 2 , R 3 , R 4 , and R 5 is independently H, (C 1 -C 6 )alkyl, or (C 1 -C 6 )alkoxy, wherein each (C 1 -C 6 )alkyl and (C 1 -C 6 )alkoxy is optionally substituted with OH, (C 1 -C 6 )alkoxy, (C 1 -C 6 )alkylthio, aryl, NR c R d , or —C(═O)NR c R d ; each X is independently NH, S, or O; each Z is independently N or CH; the bond represented by ----- is a single or a double bond; each R a is independently H, aryl, or (C 1 -C 6 )alkyl that is optionally substituted with OH, (C 1 -C 6 )alkoxy, (C 1 -C 6 )alkylthio, aryl, NR e R f , or —C(═O)NR e R f ; each R c and R d is independently H or (C 1 -C 6 )alkyl; or R c and R d together with the nitrogen to which they are attached form a pyrrolidino, piperidino, piperazino, morpholino, thiomorpholino, or azepino ring; and each R e and R f is independently H or (C 1 -C 6 )alkyl; or R e and R f together with the nitrogen to which they are attached form a pyrrolidino, piperidino, piperazino, morpholino, thiomorpholino, or azepino ring; or a salt thereof; provided the compound of formula I is not telomestatin or dehydrotelomestatin.