doi: 10.1021/np000610c.
New sesquiterpene hydroquinones from a Taiwanese marine sponge, Hippospongia metachromia
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- PMID: 11421749
- DOI: 10.1021/np000610c
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New sesquiterpene hydroquinones from a Taiwanese marine sponge, Hippospongia metachromia
J Nat Prod.
2001 Jun.
Abstract
In addition to metachromins A (1), B (2), and E (9), two new sesquiterpene hydroquinones, hippochromins A and B (3, 4), were isolated from the Taiwanese marine sponge Hippospongia metachromia. The structures of 4--6 were established by extensive 2D NMR analysis. Metachromins A (1) and B (2), hippochromin A diacetate (5), and metachromin B monoacetate (8) exhibited potent cytotoxicities against human colon (COLO-205) and nasopharyngeal (KB) tumor cells, while compounds 6, 7, and 9 were inactive.
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