| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-106126 | N/A | Impurity | |
| Istradefylline Impurity 26 | ||||
| C4X-106127 | N/A | Impurity | |
| Istradefylline Impurity 27 | ||||
| C4X-106128 | N/A | Impurity | |
| Istradefylline Impurity 28 | ||||
| C4X-106129 | 5759-63-7 | Impurity | |
| Istradefylline Impurity 29 | ||||
 | C4X-10613 | 155272-04-1 | Impurity | |
| Istradefylline Impurity 3 | ||||
| C4X-10614 | N/A | Impurity | |
| Istradefylline Impurity 4 | ||||
| C4X-10615 | N/A | Impurity | |
| Istradefylline Impurity 5 | ||||
| C4X-10616 | N/A | Impurity | |
| Istradefylline Impurity 6 | ||||
| C4X-10617 | N/A | Impurity | |
| Istradefylline Impurity 7 | ||||
| C4X-10618 | N/A | Impurity | |
| Istradefylline Impurity 8 | ||||
