Two rare alkaloids, 1-(8-N-methylpiperidyl)-butan-2-one (1) and 1-(2-N
-methylpiperidyl)pentan-2-one (2), were identified from the medicinal
plant Pratia nummularia. The structure of 1 was elucidated by means of
spectroscopic methods. Compound 2 was established by spectral compari
son with synthetic material.