tert-Butyl-4-(2-hydroxyethyl)piperazine-1-carboxylate4-(2-Hydroxyethyl)piperazine, N1-BOC protectedtert-Butyl 4-(2-hydroxyethyl)tetrahydro-1(2H)-pyrazinecarboxylatetert-butyl 4-(2-hydroxyethyl)piperazine-1-carboxylate叔丁基-4-(2-羟乙基)哌嗪-1-羧酸酯1-Boc-4-(2-hydroxyethyl)piperazine1-Boc-4-(2-hydroxyethyl)piperazine