label: (2R)-2-hydroxy-4-(methylsulfanyl)butanoate + S-adenosyl-L-methionine => (2R)-4-(dimethylsulfaniumyl)-2-hydroxybutanoate + S-adenosyl-L-homocysteine
label_lc: (2r)-2-hydroxy-4-(methylsulfanyl)butanoate + s-adenosyl-l-methionine => (2r)-4-(dimethylsulfaniumyl)-2-hydroxybutanoate + s-adenosyl-l-homocysteine