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