DL-ACETYLMETHIONINE CALCIUM SALT Bis(N-acetyl-DL-methionine)calcium salt Bis[(±)-N-acetylmethionine]calcium salt calcium 2-acetamido-4-(methylthio)butyrate calcium 2-acetamido-4-methylsulfanylbutanoate calcium 2-acetamido-4-methylsulfanyl-butanoate calcium bis(N-acetyl-DL-methioninate)