Piperazine and Impurities

1-(4-tert-butylbenzoyl)-3-methylpiperazine

5,6-dimethyl-2-[(piperazin-1-yl)methyl]-1H,4H-thieno[2,3-d]pyrimidin-4-one dihydrochloride

N,N,2-trimethyl-6-(piperazin-1-yl)pyrimidin-4-amine

(4-(Benzo[d]thiazol-2-yl)piperazin-1-yl)(4-chlorophenyl)methanone

1-(2,5-Diethylpiperazin-1-yl)-2-methylpropan-2-ol

1-Isopropyl-3-methylpiperazine

2,2-Dimethyl-3-(4-(p-tolyl)piperazine-1-carbonyl)cyclopropane-1-carboxylic acid

2-{4-[2-(pyridin-4-yl)ethyl]piperazin-1-yl}aniline

tert-Butyl 4-(4-methylpiperazin-1-yl)benzylcarbamate

rel-(1R,4R)-4-(4-(Cyclopropylmethyl)piperazin-1-yl)cyclohexan-1-amine tris(4-methylbenzenesulfonate)

1-[4-(2-chlorophenoxy)butyl]piperazine

4-(Piperazine-1-sulfonyl)benzene-1-sulfonamide hydrochloride

3-(2-oxo-2-phenylethylidene)piperazin-2-one

1-((4-Iodophenyl)sulfonyl)-4-phenylpiperazine

1-[3-(2-methylpropyl)-1,2,4-thiadiazol-5-yl]piperazine

4-(2-Amino-ethyl)-3-methyl-piperazine-1-carboxylic acid benzyl ester

2-methyl-4-piperazin-1-yl-6-(trifluoromethyl)pyrimidine

tert-Butyl 4-(5-methoxy-2-nitrophenyl)piperazine-1-carboxylate

(3-Methyl-piperazin-1-yl)-(3-methyl-thiophen-2-yl)-methanone hydrochloride

Tert-butyl 4-(6-chloropyridin-2-yl)piperazine-1-carboxylate