Seperation and structure elucidation of alkaloids from Chinese drug buzhaye, Folium Microcos

From the chloroform extracts of the dried Folium Microcos, four compounds were isolated by  using repeated column chromatography on silica gel and recrystallization and their structures were elucidated  by physicochemical properties and UV, MS and NMR, separately.  They are N-methyl-6α-(deca-l′, 3′, 5′- trienyl)-3β-methoxy-2β-methylpiperidine, 6-(deca-l′, 3′, 5′-trienyl)-3-methoxy-2-methylpiperidine, N-methyl-6- (deca-l′, 3′, 5′-trienyl)-2, 3-dimethylpiperidine and N-methyl-6-(deca-l′, 3′, 5′-trienyl)-2-methylpiperidine, named as micropiperidine A, micropiperidine B, micropiperidine C and micropiperidine D, respectively.  The latter three are new compounds.