preferred_name: cis-3-hydroxy-D-proline => trans-3-hydroxy-L-proline
preferred_name_lc: cis-3-hydroxy-d-proline => trans-3-hydroxy-l-proline
label: cis-3-hydroxy-D-proline => trans-3-hydroxy-L-proline
label_lc: cis-3-hydroxy-d-proline => trans-3-hydroxy-l-proline