L-Ala-L-Met-OH N-L-Alanyl-L-methionine (2S)-2-[[(2S)-2-aminopropanoyl]amino]-4-(methylthio)butyric acid (2S)-2-[[(2S)-2-aminopropanoyl]amino]-4-methylsulfanylbutanoic acid (2S)-2-[[(2S)-2-azanylpropanoyl]amino]-4-methylsulfanyl-butanoic acid L-ALANYL-L-METHIONINE H-ALA-MET-OH L-alanyl-methionine