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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-other | 2010

REPOSITORIES: biostudies-other

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

Tabot Maria B MB   Schnakenburg Gregor G   Gross Harald H  

Acta crystallographica. Section E, Structure reports online 20100717 Pt 8

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. ...[more]

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