2-(4-Methyl-1-piperazinyl)ethyl 4-pyridinecarboxylate dimaleate 2-(4-Methyl-1-piperazinyl)ethyl isonicotinate dimaleate 4-Pyridinecarboxylic acid, 2-(4-methyl-1-piperazinyl)ethyl ester, dimaleate 57272-32-9 ISONICOTINIC ACID, 2-(4-METHYL-1-PIPERAZINYL)ETHYL ESTER, DIMALEATE