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tert-Butyl 2-methylpiperazine-1-carboxylate120737-78-233 % similar 4-(2-Hydroxyethyl)-piperazin-1-carboxylic acid ethyl ester14000-66-933 % similar 1-(2-N-Boc-aminoethyl)piperazine140447-78-533 % similar (S)-4-N-Boc-2-methylpiperazine147081-29-633 % similar (R)-4-Boc-2-methylpiperazine163765-44-433 % similar 1,1-Dimethylethyl (2S)-2-methyl-1-piperazinecarboxylate169447-70-533 % similar (R)-1-N-Boc-2-methylpiperazine170033-47-333 % similar 3-(4-(tert-Butoxycarbonyl)piperazin-1-yl)propanoic acid242459-97-833 % similar 1-(Ethoxycarbonyl)-4-piperidone29976-53-233 % similar 1-(1,1-Dimethylethyl) 4-methyl 4-(aminomethyl)-1,4-piperidinedicarboxylate362703-35-333 % similar Dimethyl iminodiacetate hydrochloride39987-25-233 % similar Methyl 3-pyrrolidinecarboxylate98548-90-433 % similar 1-Boc-4-spiro-[3-(2-pyrrolidinone)] piperidine268550-48-733 % similar (S)-1-N-Boc-3-isopropylpiperazine475272-54-933 % similar (S)-1-Boc-2-isopropylpiperazine674792-05-333 % similar 4-N-Boc-4-N-methyl-aminopiperidine108612-54-033 % similar 4-(2-Amino-ethyl)-piperazine-1-carboxylic acid tert-butyl ester192130-34-033 % similar 4-Thiocarbamoyl-piperazine-1-carboxylic acid tert-butyl ester196811-66-233 % similar 1-(2-Furoyl)piperazine40172-95-033 % similar tert-Butyl 4-(2-hydroxyethyl)piperazine-1-carboxylate77279-24-433 % similar