A New N-Methyltetrahydroprotoberberine Alkaloid from Tinospora hainanensis

Youying GUO; Keisuke KOJIMA; Lianbo LIN; Xiaowen FU; Changqi ZHAO; Keiichiro HATANO; Ying-jie CHEN; Yukio OGIHARA

doi:10.1248/cpb.47.287

Youying GUO, Keisuke KOJIMA, Lianbo LIN, Xiaowen FU, Changqi ZHAO, Keiichiro HATANO, Ying-jie CHEN, Yukio OGIHARA

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Keywords: Tinospora hainanensis, Menispermaceae, tetrahydroprotoberberine, N-methyltetrahydrocolumbamine, crystal structure

JOURNAL FREE ACCESS

1999 Volume 47 Issue 2 Pages 287-289

DOI https://doi.org/10.1248/cpb.47.287

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Abstract

Several species of the general 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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