Isolation and structure of Halistatin 2

摘要

An intensive long-term investigation of marine organisms as sources of new anticancer drugs has led to the isolation and structural elucidation (primarily by high field NMR and mass spectrometry) of halistatin 2, a new polyether macrolide of the halipyran-type, from the Western Indian Ocean sponge Axinella cf. carteri (Dendy). Halistatin 2 (1.4x10-6% yield) caused the accumulation of cells arrested in mitosis, inhibited tubulin polymerization, and inhibited the binding of radiolabeled vinblastine and GTP to tubulino. Further, Halistatin 2 displayed significant activity against selected human tumor cell lines.