 | C4X-206711 | 611-32-5 | Impurity | |
| Papaverine Impurity 11 |
| C4X-206712 | 33520-96-6 | Impurity | |
| Papaverine Impurity 12 |
| C4X-206713 | 18813-60-0 (free base) | Impurity | |
| Papaverine Impurity 13 Hcl |
| C4X-206714 | 18694-10-5?free base? | Impurity | |
| Papaverine Impurity 14 Hcl |
| C4X-206715 | 57170-09-9 | Impurity | |
| Papaverine Impurity 15 |
| C4X-206716 | 25956-06-3?free base? | Impurity | |
| Papaverine Impurity 16 HCl |
| C4X-206717 | 18783-43-2 | Impurity | |
| Papaverine Impurity 17 |
| C4X-206718 | N/A | Impurity | |
| Papaverine Impurity 18 |
| C4X-206719 | N/A | Impurity | |
| Papaverine impurity 19 |
 | C4X-20672 | 482-76-8 | Impurity | |
| Papaverine EP Impurity B (Papaverinol) |
