preferred_name: L-tyrosylglycylglycine + L-phenylalanyl-L-leucine => Leu-enkephalin + H2O
preferred_name_lc: l-tyrosylglycylglycine + l-phenylalanyl-l-leucine => leu-enkephalin + h2o
label: L-tyrosylglycylglycine + L-phenylalanyl-L-leucine => Leu-enkephalin + H2O
label_lc: l-tyrosylglycylglycine + l-phenylalanyl-l-leucine => leu-enkephalin + h2o