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Piperazine-1-carboxylic acid dimethylamide41340-78-7100 % similar N,N-Diethyl-1-piperazinecarboxamide119-54-061 % similar 1-Acetylpiperazine13889-98-050 % similar N,N-Dimethyl-2-(piperazin-1-yl)acetamide39890-43-248 % similar Tetramethylurea632-22-448 % similar Methyl piperazine-1-carboxylate50606-31-045 % similar 2-Methyl-1-(piperazin-1-yl)propan-1-one71260-16-745 % similar N-Acetylhomopiperazine61903-11-544 % similar Ethyl 1-piperazinecarboxylate120-43-442 % similar N-Boc-piperazine57260-71-641 % similar α-Oxo-1-piperazineacetic acid691394-09-941 % similar Methylpiperazine109-01-338 % similar 1,1'-Carbonyldipyrrolidine81759-25-338 % similar 1-(Cyclopropylcarbonyl)piperazine Hydrochloride1021298-67-838 % similar 1-Methylpiperazin-2-one59702-07-738 % similar 1-Benzoylpiperazine13754-38-637 % similar 1,3-Dimethyl-2-imidazolidinone80-73-937 % similar tert-Butyl 1,4-diazepane-1-carboxylate112275-50-037 % similar Tetrabutylurea4559-86-837 % similar 2-(1-Piperazinyl)-1-(1-pyrrolidinyl)ethanone39890-45-435 % similar