Two new abietane diterpenoids from the caulis and leaves of Callicarpa kochiana |
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Authors: | Lin Chao-Zhan Zhu Chen-Chen Zhao Zhong-Xiang Li Xiao-Hui Xiong Tian-Qin Xia Yu-Ying Ning Yu |
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Institution: | School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China |
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Abstract: | Previous studies revealed that diterpenoids from Callicarpa genus were mainly of clerodane-type and phyllocladane-type, and abietane-type diterpenoids were seldom reported. In this paper, we reported two new abietane diterpenoids, kochianic acid A (1) and kochianic acid B (2), together with two known abietane-type diterpenoids, pedunculatic acid B (3) and 7α, 15-dihydroxydehydroabietic acid (4), which were all isolated from Callicarpa kochiana. The structures of the new compounds 1 and 2 were elucidated on the basis of extensive spectroscopic analysis, including HSQC, HMBC, 1H-1H COSY, ROESY and finally confirmed by single-crystal X-ray diffraction. |
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Keywords: | Callicarpa kochiana Abietane-type diterpenoid Kochianic acid A Kochianic acid B |
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