Banibrata Das, Juthika Kundu, Sitesh Chandra Bachar, Mohammad Aftab Uddin, Joydeb Kumar Kundu
An alkaloid constituent 1-[5-(1,3-benzodioxol-5-yl)-1-oxo-2,4-pentadienyl]piperidine, trivial name piperine was isolated from Ludwigia hyssopifolia Linn. (Family-Onagraceae).