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Isolation of a new carboline alkaloid from Trigonostemon lii
Hongmei Yang1, Yanping Luo1, Hongmei Zhao1
1a School of Chemistry and Chemical Engineering, Yunnan Normal University , Chenggong New District, Kunming 650500 , P.R. China.
Abstract:
A new carboline alkaloid, 1-(7-methoxy-quinolinyl-4'-yl)-3,4-dihydro-β-carboline (1), was isolated from the leaves and twigs of Trigonostemon lii Y.T. Chang, together with three known ones, trigonostemonines C and D (2 and 3), and trigonoliimine A (4). Their structures were elucidated by spectroscopic analyses, including 2D-NMR techniques.
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