preferred_name: epsilon-(gamma-L-glutamyl)-L-lysine => 5-oxo-L-proline + L-lysine
preferred_name_lc: epsilon-(gamma-l-glutamyl)-l-lysine => 5-oxo-l-proline + l-lysine
label: epsilon-(gamma-L-glutamyl)-L-lysine => 5-oxo-L-proline + L-lysine
label_lc: epsilon-(gamma-l-glutamyl)-l-lysine => 5-oxo-l-proline + l-lysine