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1-(4-Nitrobenzoyl)piperazine72141-41-436 % similar 3-Piperazin-1-yl-propionic acid27245-31-435 % similar 1,1-Dimethylethyl 1-pyrrolidinecarboxylate86953-79-935 % similar 4-(1-Piperazinylacetyl)morpholine39890-46-535 % similar Ethyl piperazine-1-acetate40004-08-835 % similar Piperidin-4-yl-acetic acid methyl ester hydrochloride81270-37-335 % similar 1-Boc-4-methylaminopiperidine147539-41-135 % similar 1-Boc-3-oxopiperazine76003-29-735 % similar tert-Butyl 2,9-diazaspiro(5.5)undecane-9-carboxylate1023595-19-835 % similar tert-Butyl 4-(2-methoxy-2-oxoethyl)piperidine-1-carboxylate175213-46-435 % similar 1-(2-Methoxyethyl)piperazine13484-40-734 % similar N,N-Dimethyl-2-(piperazin-1-yl)acetamide39890-43-234 % similar 1-((Pyrrolidine-1-carbonyl)methyl)piperazine39890-45-434 % similar 1,1-Dimethylethyl 1-piperidinecarboxylate75844-69-834 % similar tert-Butyl 4,7-diazaspiro(2.5)octane-4-carboxylate674792-08-634 % similar tert-Butyl 4,7-diazaspiro(2.5)octane-7-carboxylate886766-28-534 % similar 1-Benzyl 2-methyl piperazine-1,2-dicarboxylate126937-43-734 % similar 3-Methyl 1-(phenylmethyl) 1,3-piperazinedicarboxylate129799-11-734 % similar tert-Butyl 2,7-diazaspiro(3.5)nonane-7-carboxylate hydrochloride1023301-84-933 % similar tert-Butyl 3-methylpiperazine-1-carboxylate120737-59-933 % similar