Xeniolone and isoxeniolone. Two new diterpenes having a perhydroazulene skeleton from an Okinawan soft coral of Xenia sp.

Abstract

Two new diterpenes, named xeniolone (1) and isoxeniolone (2), were isolated from an Okinawan soft coral of Xenia sp. and their absolute configurations having a perhydroazulene skeleton were determined on the basis of chemical and physicochemical evidence.