(1R,4S)-Calamenene. Chemical correlation with the diterpene analogues of Eremophila

Abstract
(1R,4S)-(-)-Calamenene has been synthesized from dihydroxyserrulatic acid of known absolute configuration. (1R,4S)-(-)-8-Methoxycalamenene is shown to be the enantiomer of a calamenene isolated from the gorgonian Subergorgia hicksoni