| Synonyms | Pirfenidone Impurity 22A, Pirfenidone 5-Carboxylic Acid Impurity, 5-Carboxy-N-phenyl-2-1H-pyridone | 
|---|---|
| Chemical Name | 6-Oxo-1-phenyl-1,6-dihydro-pyridine-3-carboxylic acid | 
| CAS No | 77837-08-2 | 
| Molecular Formula | C12H9NO3 | 
| Molecular Weight | 215.20 | 
 5-Carboxy Pirfenidone