Structure and Absolute Stereochemistry of Bisconicasterone from the Marine Sponge Theonella swinhoei

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Abstract
Bisconicasterone was isolated from the marine sponge Theonella swinhoei, and its structure was established by spectroscopic analysis as well as chemical correlation with its monomeric component, conicasterone, the absolute stereochemistry of which was confirmed by modified Mosher’s method, chemical conversion, and by X ray crystallography.