(2R,3S)-3-Methyl-1-[4-(2-methyl-benzyloxy)-benzenesulfonyl]-piperazine-2-carboxylic acid

(2S,3R)-2-Methyl-4-[4-(2-methyl-benzyloxy)-benzenesulfonyl]-piperazine-1,3-dicarboxylic acid 3-(allyloxy-amide) 1-phenylamide