哌嗪是一种由六元环组成的有机化合物，该环含有两个位于环中相反位置的氮原子。哌嗪存在碱性碱性潮解晶体，具有咸味。
1-(2-Chlorophenyl)piperazine hydrochloride
3-Chloro-4-(4-methylpiperazin-1-yl)benzenamine
1-(2-Chloro-4-nitrophenyl)-4-methylpiperazine
1-(2-Chloro-4-nitrophenyl)piperazine
3-Chloro-4-(4-methylpiperazin-1-yl)aniline hydrochloride
4-(4-Ethylpiperazin-1-yl)phenylamine
4-(4-Ethylpiperazin-1-yl)benzoic acid
[2-(4-Ethylpiperazin-1-yl)phenyl]methanol
(4-(4-Ethylpiperazin-1-yl)phenyl)boronic acid monohydrochloride
tert-Butyl 4-(3-aminophenyl)piperazine-1-carboxylate
3-(4-Ethylpiperazin-1-yl)aniline
3-(Piperazin-1-yl)aniline hydrochloride
5-(4-(tert-Butoxycarbonyl)piperazin-1-yl)-2-nitrobenzoic acid
3-(4-(tert-Butoxycarbonyl)piperazin-1-yl)benzoic acid
3-(Piperazin-1-yl)benzoic acid hydrochloride
tert-Butyl 4-(2-nitrophenyl)piperazine-1-carboxylate
tert-Butyl 4-(4-bromo-2-nitrophenyl)piperazine-1-carboxylate
1-Boc-4-(4-Nitrophenyl)piperazine
tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate hydrochloride
tert-Butyl 4-(4-iodophenyl)piperazine-1-carboxylate
(4-[4-(tert-Butoxycarbonyl)piperazin-1-yl]phenyl)boronic acid
4-(4-(tert-Butoxycarbonyl)piperazin-1-yl)benzoic acid
1-Boc-4-(2-Aminophenyl)piperazine
tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate
1-Boc-4-(2-Formylphenyl)piperazine
tert-Butyl 4-(4-(aminomethyl)phenyl)piperazine-1-carboxylate
tert-Butyl 4-(4-amino-2-(trifluoromethyl)phenyl)piperazine-1-carboxylate
tert-Butyl 4-(4-aminophenyl)piperazine-1-carboxylate dihydrochloride
tert-Butyl 4-(3-hydroxyphenyl)piperazine-1-carboxylate
1-Boc-4-(3-Formylphenyl)piperazine
