(2R)-2-(3,4-dihydro-2H-pyrrol-5-ylamino)-3-methyl-3-sulfanylbutanoic acid

(2R)-3-methyl-2-[(1-methylazepan-2-ylidene)amino]-3-sulfanylbutanoic acid

(2R)-3-methyl-2-[(1-methylpiperidin-2-ylidene)amino]-3-sulfanylbutanoic acid

(2R)-3-methyl-2-[(1-methylpyrrolidin-2-ylidene)amino]-3-sulfanylbutanoic acid

3-[(三苯基甲基)硫代]-D-缬氨酸