preferred_name: 4-aminobutanoate + L-lysine => N(2)-(4-aminobutanoyl)-L-lysine + H2O
preferred_name_lc: 4-aminobutanoate + l-lysine => n(2)-(4-aminobutanoyl)-l-lysine + h2o
label: 4-aminobutanoate + L-lysine => N(2)-(4-aminobutanoyl)-L-lysine + H2O
label_lc: 4-aminobutanoate + l-lysine => n(2)-(4-aminobutanoyl)-l-lysine + h2o