preferred_name: L-methionyl-L-alanine + H2O => L-methionine + L-alanine
preferred_name_lc: l-methionyl-l-alanine + h2o => l-methionine + l-alanine
label: L-methionyl-L-alanine + H2O => L-methionine + L-alanine
label_lc: l-methionyl-l-alanine + h2o => l-methionine + l-alanine