1-Piperazinecarboxylic acid, 4-methyl-, 2-(diethylamino)ethyl ester 2-Diethylaminoethyl 4-methylpiperazine-1-carboxylate 4-23-00-00224 (Beilstein Handbook Reference) 4-Methyl-1-piperazinecarboxylic acid 2-(diethylamino)ethyl ester 4223-93-2 BRN 0187378