preferred_name: cis-4-hydroxy-D-proline betaine => trans-4-hydroxy-L-proline betaine
preferred_name_lc: cis-4-hydroxy-d-proline betaine => trans-4-hydroxy-l-proline betaine
label: cis-4-hydroxy-D-proline betaine => trans-4-hydroxy-L-proline betaine
label_lc: cis-4-hydroxy-d-proline betaine => trans-4-hydroxy-l-proline betaine