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