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Fitoterapia. 2012 Jan;83(1):1-5. doi: 10.1016/j.fitote.2011.09.013. Epub 2011 Sep 24.

Two new abietane diterpenoids from the caulis and leaves of Callicarpa kochiana.

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1
School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou, 510006, PR China.

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, (1)H-(1)H COSY, ROESY and finally confirmed by single-crystal X-ray diffraction.

PMID:
21983345
DOI:
10.1016/j.fitote.2011.09.013
[Indexed for MEDLINE]
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