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-Boc-3-Oxopiperazine
1-tert-Butyl 3-methyl 5-oxopiperazine-1,3-dicarboxylate
tert-Butyl 4-(2-aminoethyl)-3-oxopiperazine-1-carboxylate
(S)-1-(tert-Butoxycarbonyl)-5-oxopiperazine-2-carboxylic acid
(R)-4-((Benzyloxy)carbonyl)-1-(tert-butoxycarbonyl)piperazine-2-carboxylic acid
(S)-4-((Benzyloxy)carbonyl)-1-(tert-butoxycarbonyl)piperazine-2-carboxylic acid
(R)-1-Benzyl 4-tert-butyl 2-(hydroxymethyl)piperazine-1,4-dicarboxylate
(R)-1-Benzyl 4-tert-butyl 2-cyanopiperazine-1,4-dicarboxylate
4-Benzyl 1-tert-butyl 2-methyl piperazine-1,2,4-tricarboxylate
(S)-1-Benzyl 4-tert-butyl 2-(hydroxymethyl)piperazine-1,4-dicarboxylate
1-Benzyl 4-tert-butyl 2-(hydroxymethyl)piperazine-1,4-dicarboxylate
(R)-1-((Benzyloxy)carbonyl)-4-(tert-butoxycarbonyl)piperazine-2-carboxylic acid
4-((Benzyloxy)carbonyl)-1-(tert-butoxycarbonyl)piperazine-2-carboxylic acid
(S)-1-((Benzyloxy)carbonyl)-4-(tert-butoxycarbonyl)piperazine-2-carboxylic acid
4-((4-Methylpiperazin-1-yl)methyl)-3-(trifluoromethyl)aniline
2-(4-Methylpiperazin-1-ylmethyl)benzoic acid
4-((4-Methylpiperazin-1-yl)methyl)benzoic acid
4-(4-Methylpiperazin-1-ylmethyl)phenylamine
1-(4-Bromobenzyl)-4-methylpiperazine
Methyl 4-((4-methylpiperazin-1-yl)methyl)benzoate
2-((4-Methylpiperazin-1-yl)methyl)aniline
4-[(4-Methylpiperazin-1-yl)methyl]benzoic acid dihydrochloride
3-((4-Methylpiperazin-1-yl)methyl)benzonitrile
4-((4-Methylpiperazin-1-yl)methyl)benzoyl chloride hydrochloride
(S)-Benzyl 2-methylpiperazine-1-carboxylate hydrochloride
Benzyl 2-methylpiperazine-1-carboxylate
(S)-1-Cbz-2-Methylpiperazine
(R)-1-Cbz-2-methylpiperazine
(R)-Benzyl 2-methylpiperazine-1-carboxylate hydrochloride
1-Benzyl 4-(tert-butyl) (S)-2-methylpiperazine-1,4-dicarboxylate
