1-Methanesulfonyl-piperazine55276-43-230 % similar tert-Butyl 3-methylpiperazine-1-carboxylate120737-59-930 % similar tert-Butyl 2-methylpiperazine-1-carboxylate120737-78-230 % similar (S)-4-N-Boc-2-methylpiperazine147081-29-630 % similar (R)-4-Boc-2-methylpiperazine163765-44-430 % similar 1,1-Dimethylethyl (2S)-2-methyl-1-piperazinecarboxylate169447-70-530 % similar (R)-1-N-Boc-2-methylpiperazine170033-47-330 % similar 1-(2-Furanylcarbonyl)piperazine hydrochloride60548-09-630 % similar 1-(2-N-Boc-aminoethyl)piperazine140447-78-530 % similar 1-(4-Acetylphenyl)piperazine51639-48-630 % similar 1-Ethylpiperazine5308-25-830 % similar