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tert-Butyl 3-methylpiperazine-1-carboxylate120737-59-9100 % similar (S)-4-N-Boc-2-methylpiperazine147081-29-6100 % similar (R)-4-Boc-2-methylpiperazine163765-44-4100 % similar Tetrt-butyl5-methyl-1,4-diazepane-1-carboxylate194032-42-376 % similar (S)-1-N-Boc-3-isopropylpiperazine475272-54-972 % similar tert-Butyl 3-ethylpiperazine-1-carboxylate438049-35-566 % similar tert-Butyl (3S)-3-ethylpiperazine-1-carboxylate928025-56-366 % similar (R)-3-Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester278788-66-264 % similar 4-N-Boc-2-hydroxymethylpiperazine301673-16-564 % similar 1,1-Dimethylethyl (3S)-3-(hydroxymethyl)-1-piperazinecarboxylate314741-40-764 % similar 4-[(tert-Butoxy)carbonyl]piperazine-2-carboxylic acid128019-59-063 % similar (S)-4-N-Boc-piperazine-2-carboxylic acid848482-93-963 % similar 1-tert-Butyl 3-methyl piperazine-1,3-dicarboxylate129799-08-261 % similar 1-(1,1-Dimethylethyl) 3-methyl (3S)-1,3-piperazinedicarboxylate314741-39-461 % similar 1-(1,1-Dimethylethyl) 3-methyl (3R)-1,3-piperazinedicarboxylate438631-77-761 % similar tert-Butyl piperazine-1-carboxylate57260-71-659 % similar Methyl 4-[(1,1-dimethylethoxy)carbonyl]-2-piperazineacetate183742-33-859 % similar tert-Butyl 3-phenylpiperazine-1-carboxylate502649-25-459 % similar tert-Butyl 3-Benzylpiperazine-1-carboxylate502649-29-857 % similar tert-Butyl (2R,5S)-2,5-dimethylpiperazine-1-carboxylate309915-46-656 % similar