preferred_name: L-homocarnosine + H2O => 4-aminobutanoate + L-histidine
preferred_name_lc: l-homocarnosine + h2o => 4-aminobutanoate + l-histidine
label: L-homocarnosine + H2O => 4-aminobutanoate + L-histidine
label_lc: l-homocarnosine + h2o => 4-aminobutanoate + l-histidine