Nine new alkaloids przewaline, przewalskine, przewalskinine, przewalst
ine, przewalstinine, przewalstidine, przewalstidinine, przewalidine ch
loride, and 8-hydroxypseudocoptisine chloride were isolated from Thali
ctrum przewalskii Maxim., together with the known alkaloids berberiniu
m chloride, magnoflorine chloride, N-methylpalaudinium chloride, thalp
henine chloride, and N-methylnantenium chloride. Their structures were
determined by spectroscopy including EI-MS, FAB-MS, H-1-NMR, C-13-NMR
, C,H-COSY, C,H-COLOC, HMQC and HMBC techniques.