preferred_name: an aromatic L-alpha-amino acid + a carboxylate => an N-acyl-aromatic L-alpha-amino acid + H2O
preferred_name_lc: an aromatic l-alpha-amino acid + a carboxylate => an n-acyl-aromatic l-alpha-amino acid + h2o
label: an aromatic L-alpha-amino acid + a carboxylate => an N-acyl-aromatic L-alpha-amino acid + H2O
label_lc: an aromatic l-alpha-amino acid + a carboxylate => an n-acyl-aromatic l-alpha-amino acid + h2o