Diterpenoid constituents of the liverwort Nardia subclavata
摘要:
The liverwort, Nardia subclavata, afforded two new diterpene esters, bis-[ent-16-kauren-14R-yl] malonate and a bisditerpene derived from the esterification of malonic acid by phytol and ent-16-kauren-14R-ol, in addition to perrottetin E, beta-barbatene, (-)-kolavelool and ent-16-kauren-14R-yl hydrogen malonate. Their structures were established by chemical and spectral means. Perrottetin E and ent-16-kauren-14R-yl hydrogen malonate were the major constituents of this species.