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1,2-DIMETHYL-PIPERAZINE trans-2,5-Dimethylpiperazine 2,5-Dimethylpiperazine (2S,5R)-2,5-DIMETHYL-PIPERAZINE-1-CARBOXYLIC ACID TERT-BUTYL ESTER 2,2-DIMETHYL-PIPERAZINE DIHYDROCHLORIDE (2R,5S)-2,5-DIMETHYL-PIPERAZINE-1-CARBOXYLIC ACID TERT-BUTYL ESTER 1-BOC-2,2-DIMETHYL-PIPERAZINE 1-CBZ-3,5-DIMETHYL-PIPERAZINE