cis-3-hydroxy-D-proline => trans-3-hydroxy-L-proline
cis-3-hydroxy-d-proline => trans-3-hydroxy-l-proline
cis-3-hydroxy-D-proline => trans-3-hydroxy-L-proline
cis-3-hydroxy-d-proline => trans-3-hydroxy-l-proline