A new piperidine alkaloid 1-[7-(1,3-benzodioxol-5-yl)-1-oxo-2, 4-hepta
dienyl]piperidine, piperdardine, was isolated from hexane and chlorofo
rm extracts of Piper tuberculatum var. tuberculatum. A combination of
1D and 2D NMR, together with other spectroscopic methods, led to the u
nambiguous assignments of all protons and carbons of the molecule. Cop
yright (C) 1997 Elsevier Science Ltd