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(R)-(+)-2-Piperazinecarboxylic acid dihydrochloride

N-Phenylglycine

(S)-Piperazine-2-carboxylic acid dihydrochloride

Potassium hypophosphite

D-2-Phenylglycine

2-Piperazinecarboxylic acid dihydrochloride

Potassium hydroxide

L-Phenylglycine

L(+)-Potassium hydrogen tartrate

1,4-Piperazinedipropanesulfonic acid