Abstract
Several species of the genera Tinospora (Menispermaceae) are widely distributed over Asia and Africa and are well-known for their medicinal properties. From the stems of Tinospora hainanensis, a new N- methyltetrahydroprotoberberine alkaloid, N-methyltetrahydrocolumbamine, was isolated and characterized on the basis of NMR, MS and X-ray.
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Guo, Y., Kojima, K., Lin, L., Fu, X., Zhao, C., Hatano, K., … Ogihara, Y. (1999). A new N-methyltetrahydroprotoberberine alkaloid from Tinospora hainanensis. Chemical and Pharmaceutical Bulletin, 47(2), 287–289. https://doi.org/10.1248/cpb.47.287
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