Pregna-1,4,20-trien-3-one, a cytotoxic marine steroid from the marine soft coral Nephthea sp.

ABSTRACT: The title compound, C(21)H(28)O, was isolated from the cytotoxic lipid extract of the Fidjian soft coral Nephthea sp. The steroid showed inhibitory activity to human colon adenocarcinoma SW480 cells (IC(50) = 2.5 µg ml(-1)). The mol-ecular structure indicates that the A ring is almost planar (r.m.s. deviation = 0.032 Å), the B and C rings adopt chair conformations and the five-membered D ring is a half-chair. The B/C and C/D ring junctions are trans-fused.

SUBMITTER: Tabot MB 

PROVIDER: S-EPMC3007447 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature