but-2-enedioic acid,2-(2-piperidin-1-ylethyl)pyridine

but-2-enedioic acid,1-methyl-4-(2-pyridin-2-ylethyl)piperazine

1,4-bis(2-pyridin-2-ylethyl)piperazine,but-2-enedioic acid

but-2-enedioic acid,1-phenyl-4-(2-pyridin-2-ylethyl)piperazine

but-2-enedioic acid,phenyl-[4-(2-pyridin-2-ylethyl)piperazin-1-yl]methanone