preferred_name: Xaa-L-Pro dipeptide + H2O => an L-alpha-amino acid + L-proline
preferred_name_lc: xaa-l-pro dipeptide + h2o => an l-alpha-amino acid + l-proline
label: Xaa-L-Pro dipeptide + H2O => an L-alpha-amino acid + L-proline
label_lc: xaa-l-pro dipeptide + h2o => an l-alpha-amino acid + l-proline