preferred_name: L-phenylalanyl-L-methionine + L-tyrosylglycylglycine => Met-enkephalin + H2O
preferred_name_lc: l-phenylalanyl-l-methionine + l-tyrosylglycylglycine => met-enkephalin + h2o
label: L-phenylalanyl-L-methionine + L-tyrosylglycylglycine => Met-enkephalin + H2O
label_lc: l-phenylalanyl-l-methionine + l-tyrosylglycylglycine => met-enkephalin + h2o