4-piperazin-1-yl-2-(trifluoromethyl)pyrimidine

丁基哌嗪-1-羧酸

phenyl piperazine-1-carboxylate

1,3,7-三甲基-8-哌嗪-1-基-3,7-二氢嘌呤-2,6-二酮

3-(N-哌嗪-1-基)-6-苯基吡嗪