2-(4-Ethyl-1-piperazinyl)-4-phenylquinoline (Z)-2-butenedioate (1:2) 2-(4-Ethyl-1-piperazinyl)-4-phenylquinoline dimaleate 72320-59-3 94788-64-4 Quinoline, 2-(4-ethyl-1-piperazinyl)-4-phenyl-, (Z)-2-butenedioate (1:2)