哌嗪2-甲酸二盐酸盐

1,4-dibenzyl-6,6-diethyl-1,4-diazepane-5,7-dione

1,4-dibenzyl-N-propylpiperazine-2-carboxamide

1,3-dibenzylimidazolidin-2-one

1,4-dibenzyl-2-(4-fluorophenyl)piperazine