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A new quinolizidine alkaloid, 3-(4-hydroxyphenyl)-4-(3-methoxy-4-hydroxyphenyl)-3, 4-dehydroquinolizidine (1), was isolated from the ethanol extract of the whole plants of Boehmeria siamensis Craib. Its structure was elucidated on the analysis of 1D NMR and 2D NMR spectrum.
A new quinolizidine alkaloid, 3- (4-hydroxyphenyl) -4- (3-methoxy-4-hydroxyphenyl) -3, 4-dehydroquinolizidine (1), was isolated from the ethanol extract of the whole plant of Boehmeria siamensis Craib. structure was elucidated on the analysis of 1D NMR and 2D NMR spectra.