Altohyrtins B and C and 5-desacetylaltohyrtin A, potent cytotoxic macrolide congeners of altohyrtin A, from the okinawan marine sponge Hyrtios altum.
- 1 January 1993
- journal article
- Published by Pharmaceutical Society of Japan in CHEMICAL & PHARMACEUTICAL BULLETIN
- Vol. 41 (5) , 989-991
- https://doi.org/10.1248/cpb.41.989
Abstract
Following the characterization of altohyrtin A (1), altohyrtins B (2) and C (3) and 5-desacetylaltohyrtin A (4) have been isolated from the Okinawan marine sponge Hyrtios altum and their plane structures and parts of their relative configurations elucidated. Three congeneric macrolides (2, 3, and 4) exhibit extremely potent cytotoxicities similar to those of 1 against KB cells with IC50 values of 0.02, 0.4, and 0.3 ng/ml, respectively.Keywords
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