CAS 1334173-77-1 appears in our catalog under these names: (S)-Piperazine-2-carboxylic acid methyl ester dihydrochloride, 95%, (S)-Piperazine-2-carboxylic acid methyl ester dihydrochloride 97%, (S)-Piperazine-2-carboxylic acid methyl ester dihydrochloride, 95%, 95%. Offered by: Combi-blocks, Ambeed, Chemat. Available pack sizes: 250mg, 5g, 1g, 100mg.