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1-(1,1-Dimethylethyl) 2-methyl 1,2-piperazinedicarboxylate129799-15-139 % similar 1-(1,1-Dimethylethyl) 3-methyl (3S)-1,3-piperazinedicarboxylate314741-39-439 % similar 1-(1,1-Dimethylethyl) 3-methyl (3R)-1,3-piperazinedicarboxylate438631-77-739 % similar (S)-1-N-Boc-piperazine-2-carboxylic acid methyl ester796096-64-539 % similar Methyl 4-piperidineacetate168986-49-038 % similar (Piperazin-1-yl)(tetrahydrofuran-2-yl)methanone63074-07-738 % similar 5-Oxo-(1,4)diazepane-1-carboxylic acid tert-butyl ester190900-21-138 % similar N-(Methoxycarbonyl)maleimide55750-48-638 % similar 1-(Cyclopropylcarbonyl)piperazine Hydrochloride1021298-67-837 % similar Methyl 4-[(1,1-dimethylethoxy)carbonyl]-2-piperazineacetate183742-33-837 % similar Benzoylpiperazine hydrochloride56227-55-537 % similar 1-(1,1-Dimethylethyl) 4-methyl 1,4-piperidinedicarboxylate124443-68-137 % similar 2,8-Diaza-spiro[4.5]decane-8-carboxylic acid tert-butyl ester236406-39-637 % similar tert-Butyl 2,8-diazaspiro[4.5]decane-2-carboxylate336191-17-437 % similar 1-Boc-4-methylpiperazine53788-49-136 % similar Methyl isonipecotate hydrochloride7462-86-436 % similar 2-(tert-Butoxycarbonyl)-2,7-diazaspiro[3.5]nonane236406-55-636 % similar Ethyl 4-(methylamino)-1-piperidinecarboxylate73733-69-436 % similar tert-Butyl 2,7-diazaspiro[3.5]nonane-7-carboxylate896464-16-736 % similar Tetrt-butyl5-methyl-1,4-diazepane-1-carboxylate194032-42-336 % similar