1-Piperazineethanamine, N,N-bis(1-methylethyl)-4-(2-pyridinyl)-, ethanedioate (1:3) 103840-59-1 N,N-Bis(1-methylethyl)-4-(2-pyridinyl)-1-piperazineethanamine ethanedioate (1:3) N,N-Diisopropyl-4-(2-pyridinyl)-1-piperazineethanamine oxalate