The synthesis and biological activity of N-epsilon-Z-[Lys(3)]didemnin B are reported. This novel analogue retains antiproliferative, cytotoxic, and protein biosynthesis inhibition activities, but at reduced levels. This result suggests the use of [Lys(3)]didemnin derivatives as potential affinity probes for studying the molecular target(s) of the didemnin class of natural products. (C) 2000 Elsevier Science Ltd. All rights reserved.
The synthesis and biological activity of N-epsilon-Z-[Lys(3)]didemnin B are reported. This novel analogue retains antiproliferative, cytotoxic, and protein biosynthesis inhibition activities, but at reduced levels. This result suggests the use of [Lys(3)]didemnin derivatives as potential affinity probes for studying the molecular target(s) of the didemnin class of natural products. (C) 2000 Elsevier Science Ltd. All rights reserved.