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Two new protoberberine quaternary alkaloids from Corydalis yanhusuo
Xing-Ye Cheng1, Yue Shi, Shun-Liang Zheng
1Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Journal of Asian Natural Products Research
|November 26, 2008
Abstract:
Two new protoberberine quaternary alkaloids, 13-methyl-palmatrubine (1) and 13-methyl-dehydrocorydalmine (2), were isolated from the tubers of Corydalis yanhusuo W.T. Wang. 1 was isolated as a natural product for the first time, and 2 a new compound. Their structures were elucidated on the basis of spectroscopic evidence, especially 1D- and 2D-NMR experiments.
