1-Pyridin-2-yl-piperazin-2-one 2HCl

1-(2-Hydroxyethyl)-4-methylpiperazine
2-(4-Methyl-piperazin-1-yl)-ethanol

(R)-1-Boc-2-Benzylpiperazine

(R)-1-Boc-3-butyl-piperazine

(S)-1-Boc-3-butyl-piperazine

(R)-1-Boc-2-Ethyl-piperazine

(S)-1-Boc-2-Ethyl-piperazine

(S)-1-BOC-2-Hydroxymethylpiperazine

(R)-1-Boc-3-Hydroxymethyl-piperazine
(R)-3-Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester

(S)-1-Boc-2-Isopropyl-piperazine

(R)-1-BOC-2-methylpiperazine

(S)-1-N-Boc-Piperazine-2-carboxylic acid methyl ester

(S)-1-N-Boc-Piperazine-3-carboxylic acid methyl ester

N-tert-Butoxycarbonylpiperazine
N-(BOC)-piperazine

tert-butyl 4-((Pyridin-2-yl)methyl)piperazine-1-carboxylate
4-Pyridin-2-ylmethyl-piperazine-1-carboxylic acid tert-butyl ester

(4-carbamoylpiperazin-1-yl)acetic acid

4-Piperazin-1-yl-benzoic acid