preferred_name: an N(6)-acyl-L-lysine + H2O => a carboxylate + L-lysine
preferred_name_lc: an n(6)-acyl-l-lysine + h2o => a carboxylate + l-lysine
label: an N(6)-acyl-L-lysine + H2O => a carboxylate + L-lysine
label_lc: an n(6)-acyl-l-lysine + h2o => a carboxylate + l-lysine