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tert-Butyl 3-ethylpiperazine-1-carboxylate438049-35-5100 % similar (R)-3-Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester278788-66-273 % similar 4-N-Boc-2-hydroxymethylpiperazine301673-16-573 % similar 1,1-Dimethylethyl (3S)-3-(hydroxymethyl)-1-piperazinecarboxylate314741-40-773 % similar Methyl 4-[(1,1-dimethylethoxy)carbonyl]-2-piperazineacetate183742-33-867 % similar tert-Butyl 3-methylpiperazine-1-carboxylate120737-59-966 % similar (S)-4-N-Boc-2-methylpiperazine147081-29-666 % similar (R)-4-Boc-2-methylpiperazine163765-44-466 % similar tert-Butyl 3-Benzylpiperazine-1-carboxylate502649-29-865 % similar (S)-1-N-Boc-3-isopropylpiperazine475272-54-964 % similar 4-[(tert-Butoxy)carbonyl]piperazine-2-carboxylic acid128019-59-060 % similar (S)-4-N-Boc-piperazine-2-carboxylic acid848482-93-960 % similar 1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate129799-08-259 % similar 1-(1,1-Dimethylethyl) 3-methyl (3S)-1,3-piperazinedicarboxylate314741-39-459 % similar 1-(1,1-Dimethylethyl) 3-methyl (3R)-1,3-piperazinedicarboxylate438631-77-759 % similar 1,1-Dimethylethyl (3S)-3-(methylamino)-1-pyrrolidinecarboxylate147081-59-258 % similar 1-Pyrrolidinecarboxylicacid,3-(methylamino)-,1,1-dimethylethylester,(R)-(9ci)199336-83-958 % similar 1-Boc-3-methylaminopyrrolidine454712-26-658 % similar Tetrt-butyl5-methyl-1,4-diazepane-1-carboxylate194032-42-357 % similar N-Boc-piperazine57260-71-656 % similar