beta-methyllanthionine

(2S,3S,2'R)-β-Methyllanthionine

(2S,3S,6R)-2,6-Diamino-3-methyl-4-thiaheptanedioic acid

(2S,3S)-2-Amino-3-[[(2R)-2-amino-2-carboxyethyl]thio]butyric acid