Participation of the conjugated diene part for potent cytotoxicity of callystatin A, a spongean polyketide
作者:Nobutoshi Murakami、Masanori Sugimoto、Tatsuo Nakajima、Motoyuki Kawanishi、Yasuhiro Tsutsui、Motomasa Kobayashi
DOI:10.1016/s0968-0896(00)00199-1
日期:2000.11
5-epi, 10-epi, 8-Deethyl, and 10-demethyl analogues of callystatin A, a potent cytotoxic spongean polyketide, were synthesized to elucidate structure-requirement for cytotoxic potency. Inversion of the asymmetric center at C-10 in callystatin A minimally affected the activity, while lack of the 10-methyl group in callystatin A decreased cytotoxicity. In addition, the C-5 epimer and the 8-deethyl analogue of callystatin A showed weaker cytotoxicity. (C) 2000 Elsevier Science Ltd. All rights reserved.