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Note | Regular issue | Vol 63, No. 4, 2004, pp.861-864
Published online, 20th February, 2004
DOI: 10.3987/COM-03-9981
A New Tricyclic 6-7-5-Ring Diterpene from Pliocene Fossil Tsuga dumosa

You-Xing Zhao, Cheng-Sen Li, Xiao-Dong Luo, and Jun Zhou*

*State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, Yunnan, China


A new diterpene named (+)-parryin-15,16-O-isopropylidene (1) and three known isopimara analogues (2-4) were isolated from the Pliocene lignified wood of Tsuga dumosa collected in Changning coalmine, Yunnan, China. Their structures were elucidated by spectroscopic analysis.