MRTX0902 is an oral brain penetrating SOS1:KRAS protein-protein interaction inhibitor with an IC50 of 46 nM. MRTX0902 displays high selectivity on SOS1 (Ki=2 nM) over SOS2 and EGFR (both Ki values >10,000 nM), MRTX0902 inhibits MKN1 cells with an IC50 value of 29 nM. MRTX0902 (25, 50 mg/kg; p.o.; twice daily; 25 d) shows anti-tumor effect in mouse model and results tumor regression.
| Molecular Weight | 388.47 |
| Formula | C22H24N6O |
| CAS Number | 2654743-22-1 |
| Solubility (25°C) | DMSO 12 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
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