1-(Phenylmethyl)-4-(2-pyridinylcarbonyl)piperazine (E)-2-butenedioate (1:1) 1-Benzyl-4-picolinoylpiperazine fumarate (1:1) 39640-14-7 70062-37-2 Egyt 475 KL 137 Piberalina [Spanish] Piperazine, 1-(phenylmethyl)-4-(2-pyridinylcarbonyl)-, (E)-2-butenedioate (1:1) Trelibet