Conversion of hydroxyproline to pyrrole-2-carboxylic acid.
D006909:Hydroxyproline; D011392:Proline / Q000031:analogs & derivatives; D011758:Pyrroles
D011758:Pyrroles; C002986:2-pyrrolecarboxylic acid; D011392:Proline; D006909:Hydroxyproline
PROLINE/related compounds; PYRROLES/preparation of