1-(3,4-Methylenedioxybenzyl)-4-(3-phenylprop-2-ynyl)piperazine 4-(3-Phenylprop-2-ynyl)-1-piperonylpiperazine 55436-42-5 BRN 0836840 Piperazine, 1-(3,4-methylenedioxybenzyl)-4-(3-phenylprop-2-ynyl)-