Abstract

A new structurally unique trimeric fatty acid derivative, manzamenone O (1), was isolated from a marine sponge Plakortis sp. Manzamenone O (1) has a novel skeleton consisting of C-C bonded octahydroindenone and dioxabicyclo[3.3.0]octane moieties and three long aliphatic chains. The structure of 1 was elucidated on the basis of spectroscopic data and conformational analysis. Manzamenone O (1) exhibited antimicrobial activity against Micrococcus luteus, Aspergillis niger, and Trichophyton mentagrophytes.

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