preferred_name: methylglyoxal + L-lysyl-[protein] => N(6)-(1-hydroxy-2-oxopropyl)-L-lysyl-[protein]
preferred_name_lc: methylglyoxal + l-lysyl-[protein] => n(6)-(1-hydroxy-2-oxopropyl)-l-lysyl-[protein]
label: methylglyoxal + L-lysyl-[protein] => N(6)-(1-hydroxy-2-oxopropyl)-L-lysyl-[protein]
label_lc: methylglyoxal + l-lysyl-[protein] => n(6)-(1-hydroxy-2-oxopropyl)-l-lysyl-[protein]