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Two New Clerodane-type Diterpenoids from Gomphostemma microdon Rong-Ting Zhang

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Two New Clerodane-type Diterpenoids from Gomphostemma microdon

Rong-Ting Zhanga,b, Tao Fenga,b, Xiang-Hai Caia, and Xiao-Dong Luoa

aState Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, 132 Lanhei Road, Kunming 650204, P. R. China

bGraduate Schoolof Chinese Academy of Sciences, Beijing 100039, P. R. China

Reprint requests to Prof. Dr. Xiao-Dong Luo. Fax: +86-871-5150227. E-mail: xdluo@mail.kib.ac.cn Z. Naturforsch.2009,64b,443 – 446; received November 30, 2008

Two new clerodane-type diterpenoids, along with seven known compounds have been isolated from the aerialparts ofGomphostemma microdon. All structures were established on the basis of spectroscopic analyses, including application of MS, UV, IR, 1D and 2D NMR techniques.

Key words: Gomphostemma microdon, Clerodane Diterpenoids,MicrodonA,MicrodonB Diterpenes

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