A C-3 methylated isocembranoid and 10-oxocembranoids from a formosan soft coral, Sinularia grandilobata.
JOURNAL OF NATURAL PRODUCTS 2008;
71:946-951. [PMID:
18447385 DOI:
10.1021/np7007335]
[Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Five new cembranoids, designated grandilobatins A-E (1- 5), were isolated from the soft coral Sinularia grandilobata. Grandilobatin C (3) was found to have a novel skeleton with the C-4 methyl group of the normal cembranoid rearranged to C-3, while the other metabolites were identified as new 10-oxocembranoids. Metabolite 4 has weak cytotoxicity toward MDA-MB-23 human breast tumor cells. Also, 4 significantly inhibited the accumulation of the pro-inflammatory iNOS protein of LPS-stimulated RAW264.7 macrophage cells at 50 microM.
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