Epimeric pavine N-oxides from Thalictrum simplex
1995
Velcheva, M.P. | Danghaaghiin, S. | Samdanghiin, Z. | Yansanghin, Z.
Two novel epimeric N-oxides, (-)-thalimonine N-oxide A and (-)-thalimonine N-oxide B isolated as mixture from Thalictrum simplex were separated by reverse-phase HPLC. The structures of the epimers were established by spectral analysis and confirmed by synthesis. The IR spectral absorption band of Me-N+-O- group of each epimer was ascertained. The known aporphine alkaloid (+)-leucoxylonine was isolated for the first time from a member of the Ranunculaceae, together with the new (+)-leucoxylonine N-oxide.
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