| Sapropterin Nitroso Impurity 2 | NA | Ax-14302 |
| Sapropterin Nitroso Impurity 1 | NA | Ax-14301 |
| Sapropterin Nitroso Impurity 3 | 1355024-07-5 | Ax-14300 |
| (1R,2S)-2-amino-1-methylcyclopentan-1-ol | 1430230-57-1 | Ax-14299 |
| 3,5-Difluoro-4-iodobenzonitrile | 1487337-76-7 | Ax-14298 |
| 3-fluoro-2,2-dimethylpropanoic acid | 64241-77-6 | Ax-14297 |
| methyl 3-fluoro-2,2-dimethylpropanoate | 1068560-15-5 | Ax-14296 |
| N-(4-(2-(methylamino)ethoxy)phenyl)methanesulfonamide | 115256-15-0 | Ax-14295 |
| N-(4-(2-(methylamino)ethyl)phenyl)methanesulfonamide | 115256-16-1 | Ax-14294 |
| N-Nitroso Esomeprazole Impurity | NA | Ax-14293 |