preferred_name: urea + 4-aminobutanoate => 4-guanidinobutanoate + H2O
preferred_name_lc: urea + 4-aminobutanoate => 4-guanidinobutanoate + h2o
label: urea + 4-aminobutanoate => 4-guanidinobutanoate + H2O
label_lc: urea + 4-aminobutanoate => 4-guanidinobutanoate + h2o