Fm-479 was a negative control of FM-381 and showed no activity against JAK3 or other kinases. Fm-381 is a potent covalent reversible inhibitor of JAK3 targeting unique Cys909. For JAK3, FM-381 was 410, 2700 and 3600 times more selective than JAK1, JAK2 and TYK2 with IC50 of 127 pM.
Molecular Weight | 442.51 |
Formula | C25H26N6O2 |
CAS Number | 2226521-64-6 |
Solubility (25°C) | N/A |
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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GDC046
GDC046 (Compound 3) is a potent, selective, and orally bioavailable inhibitor of TYK2 with Ki of 4.8 nM, 83.8 nM, 27.6 nM and 253 nM for TYK2, JAK1, JAK2, and JAK3, respectively. |
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