14-Hydroxy-8,14-secogammacera-7-ene-3,21-dione from the bark of Lansium domesticum Corr.

In the title compound (kokosanolide B), C30H48O3, the hexahydro- and octahydronaphthalen-2-one ring systems are connected through an ethylene fragment, with a C—CH2—CH2—C torsion angle of 176.2 (2)°. The cyclohexene ring adopts a half-chair conformation, while the other six-membered rings adopt distorted chair conformations. In the crystal, adjacent molecules are linked into a zigzag chain along the b axis by O—H...O hydrogen bonds involving the hydroxy and carbonyl groups.

Abstract licence: CC BY

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