preferred_name: N(omega)-(1-hydroxy-2-oxoethyl)-L-arginyl-[protein] => glyoxal + L-arginyl-[protein]
preferred_name_lc: n(omega)-(1-hydroxy-2-oxoethyl)-l-arginyl-[protein] => glyoxal + l-arginyl-[protein]
label: N(omega)-(1-hydroxy-2-oxoethyl)-L-arginyl-[protein] => glyoxal + L-arginyl-[protein]
label_lc: n(omega)-(1-hydroxy-2-oxoethyl)-l-arginyl-[protein] => glyoxal + l-arginyl-[protein]