preferred_name: S-methyl-L-methionine + S-adenosyl-L-homocysteine => L-methionine + S-adenosyl-L-methionine
preferred_name_lc: s-methyl-l-methionine + s-adenosyl-l-homocysteine => l-methionine + s-adenosyl-l-methionine
label: S-methyl-L-methionine + S-adenosyl-L-homocysteine => L-methionine + S-adenosyl-L-methionine
label_lc: s-methyl-l-methionine + s-adenosyl-l-homocysteine => l-methionine + s-adenosyl-l-methionine