Five alkaloids were isolated from the epigeal part of Oxytropis myriophylla. Three alkaloids were identified as N-benzoyl-β-phenylethylamine, N-trans-cinnamoyl-β-phenylethylamine, N-cis-cinnamoyl-β-phenylethylamine and the structures of two new alkaloids were elucidated to be N-benzoyl-β-hydroxyphenylethylarnine(2), N-trans-cinnamoyl-β-hydroxy-phenylethylamine(5). The absolu.te structures were established by modified Mosher method.
Keywords: Fabaceae; N-benzoyl-β-hydroxy-phenylethylamine; N-benzoyl-β-phenylethylamine; N-cis-cinnamoyl-β-phenylethylamine; N-trans-cinnamoyl-β-hydroxyphenylethylamine; N-trans-cinnamoyl-β-phenylethylamine; Oxytropis myriophylla (Pall) DC; alkaloid.