2-Butenoic acid, 4,4'-(2-methyl-1,4-piperazinediyl)bis(4-oxo-, diethyl ester 2-Butenoic acid, 4,4'-(2-methyl-1,4-piperazinediyl)bis[4-oxo-, diethyl ester 36680-08-7 NSC337310