Piperazine and Impurities

1-(4-Acetyl-1-piperazinyl)-2-bromo-ethanone

n-(4-Methoxyphenyl)-2-(4-(4-methoxyphenyl)piperazin-1-yl)acetamide

tert-Butyl 4-[2-(4-Formylphenoxy)ethyl]piperazine-1-carboxylate

(4-Benzoylpiperazin-1-yl)(3-chlorophenyl)methanone

2-(4-Ethylpiperazin-1-yl)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde

tert-Butyl 4-(2-(((benzyloxy)carbonyl)amino)ethyl)piperazine-1-carboxylate

{3-Chloro-2-[4-(4-methylbenzoyl)piperazin-1-yl]phenyl}amine

4-(Piperazin-1-yl)-2-(pyridin-2-yl)-6-(trifluoromethyl)pyrimidine

4-Methoxy-6-(3-methyl-piperazin-1-yl)-2-methylsulfanyl-pyrimidine hydrochloride

tert-Butyl 4-(2-fluoro-5-((4-oxo-3,4-dihydrophthalazin-1-yl)methyl)benzoyl)piperazine-1-carboxylate

tert-Butyl 4-(5-bromothiazol-2-yl)piperazine-1-carboxylate

1-Boc-4-(4-Bromo-2-formylphenyl)piperazine

2-(4-Methylpiperazin-1-yl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine

N-(3-methylphenyl)-2-piperazin-1-ylacetamide

1-[(5-ethyl-4-methyl-4h-1,2,4-triazol-3-yl)methyl]piperazine

1-(1-(Pyridin-4-yl)ethyl)piperazine

2-Ethyl-3-oxopiperazine-1-carbothioamide

1-(4-(Benzo[d][1,3]dioxol-5-yloxy)but-2-yn-1-yl)-4-methylpiperazine

4-(Furan-2-carbonyl)-N-phenylpiperazine-1-carboxamide

2-[4-(4-fluorophenyl)piperazin-1-yl]-5-nitrobenzonitrile