(9H-fluoren-9-yl)methyl piperazine-1-carboxylate (R)-2-benzylpiperazine 1,4-diphenylpiperazine 1-(2-chlorophenyl)piperazine 1-(2-fluorophenyl)piperazine 1-(3-methoxyphenyl)piperazine 1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperazine 1-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine 1-(methylsulfonyl)piperazine 1-(phenylsulfonyl)piperazine 1-(piperidin-4-yl)piperazine 1-(pyridin-3-yl)piperazine 1-(pyridin-3-ylmethyl)piperazine 1-benzhydryl-4-benzylpiperazine 1-benzhydrylpiperazine 1-benzyl 4-(tert-butyl) piperazine-1,4-dicarboxylate 1-benzyl-4-methylpiperazine 1-ethyl-4-phenylpiperazine 1-ethylpiperazine 1-isopropylpiperazine 1-methyl-4-(pyridin-2-yl)piperazine 1-methyl-4-phenylpiperazine 1-methylpiperazin-2-one 1-methylpiperazine 10-(3-(piperazin-1-yl)propyl)-10H-phenothiazine 2-(4-(benzyloxy)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 2-(piperazin-1-yl)benzonitrile 2-(piperazin-1-yl)ethan-1-amine 2-(piperazin-1-yl)ethan-1-ol 2-(piperazin-1-yl)pyrazine 2-(piperazin-1-yl)pyrimidine 2-phenylpiperazine 3-(piperazin-1-yl)aniline 3-(piperazin-1-yl)benzoic acid 3-(piperazin-1-yl)pyridazine 3-methylpiperazin-2-one 4-(piperazin-1-yl)benzaldehyde 4-(piperazin-1-yl)pyrimidine benzyl 2-methylpiperazine-1-carboxylate benzyl 3-(hydroxymethyl)piperazine-1-carboxylate benzyl 3-methylpiperazine-1-carboxylate phenyl(piperazin-1-yl)methanone piperazine-2,5-dione tert-butyl 3-oxopiperazine-1-carboxylate tert-butyl 4-(pyridin-2-yl)piperazine-1-carboxylate tert-butyl 4-benzylpiperazine-1-carboxylate tert-butyl 4-phenylpiperazine-1-carboxylate tert-butyl piperazine-1-carboxylate

benzothiophene-piperazine benzylpiperazine boc-piperazine butylpiperazine cyanopiperazine dimethylpiperazine dioxaborolane-piperazine ethylpiperazine formylpiperazine hydroxyethyl-piperazine hydroxymethyl-piperazine-carboxylate indazo-piperazine isobutylpiperazine isopropylpiperazine methylpiperazine oxopiperazine phenylpiperazine piperazin-amine piperazin-one piperazin-pyrimidin piperazine-carboxylate piperazine-carboxylic acid piperazine-carboxylic-acid piperazine-hydrochloride piperazine-hydroxyl piperazine-methanol piperazine-pyrazine piperazine-pyridine piperazine-quinoline propylpiperazine pyrazol-piperazine sulfonyl-piperazine trifluoromethyl-phenyl-piperazin trifluoromethyl-piperazine trimethylpiperazine

Aliphatic Heterocycles Aromatic Heterocycles Azetidines Benzimidazoles Benzofurans Benzothiazoles Benzothiophenes Dioxolanes Furans Imidazoles Imidazolines Indazoles Indoles Morpholines Non-Halogenated Heterocycles Other Aromatic Heterocycles Oxetanes Phthalazines Piperidines Pyrazines Pyrazoles Pyridazines Pyridines Pyrimidines Quinazolines Quinolines Spiroes Tetrahydrofurans Thiazoles Triazoles

Alcohols Aldehydes Alkenyls Alkyls Alkynyls Amides Amines Aryls Bromides Carboxylic Acids Chiral Building Blocks Chlorides Esters Ethers Fluorinated Building Blocks Hydrazides Hydrazines Ketones Nitriles Nitroes Phenols Sulfamides Sulfones Sulfonic Acids Sulfonyl Chlorides Thioureas Trifluoromethyls Ureas