Zotizalkib

• CAT Number: I044430
• CAS Number: 2648641-36-3
• Molecular Formula: C21H20F3N5O3
• Molecular Weight: 447.41
• Purity: ≥95%
• Synonyms: (18S)-18-(difluoromethyl)-13-fluoro-7,7-dimethyl-9,20-dioxa-1,2,6,17,23-pentazapentacyclo[19.3.1.04,24.010,15.017,22]pentacosa-2,4(24),10(15),11,13,21(25),22-heptaen-5-one
• InChI: InChI=1S/C21H20F3N5O3/c1-21(2)10-32-15-4-3-12(22)5-11(15)7-28-14(17(23)24)9-31-16-8-29-18(26-19(16)28)13(6-25-29)20(30)27-21/h3-6,8,14,17H,7,9-10H2,1-2H3,(H,27,30)/t14-/m0/s1
• InChIKey: ILAMRXVQSGVCJX-AWEZNQCLSA-N
• SMILES: CC1(COC2=C(CN3C(COC4=CN5C(=C(C=N5)C(=O)N1)N=C43)C(F)F)C=C(C=C2)F)C

Zotizalkib (TPX-0131) is a potent, selective, CNS-penetrant and orally active inhibitor of wild-type ALK (IC50 of 1.4 nM) and ALK-resistant mutation, e.g. G1202R (IC50 of 0.3 nM), L1196M (IC50 of 0.3 nM). Zotizalkib has strong antitumor activities[1].
Zotizalkib potently inhibits wild-type ALK (IC50=1.4 nM) and 26 ALK resistance mutations. Zotizalkib inhibits C1156Y, E1210K/S1206C, L1198F/C1156Y, L1196M/L1198F, E1210K, L1196M, T1151M, deleted G1202, S1206R, G1202R/L1198F, F1174L, F1245C, R1275Q, and G1202R ALK mutations with IC50 values of <1 nM. Zotizalkib has IC50 values of 1-2 nM for the following ALK mutations: L1198F, L1152R, F1174S, T1151-L1152 insT, V1180L, G1269A, F1174C. Zotizalkib is less active against ALK mutations including I1171N, L1152P, D1203N, D1203N/E1210K, and G1269S, with IC50 values of 2-7 nM[1]. Zotizalkib is a potent inhibitor of ALK autophosphorylation in Ba/F3 cells expressing EML4-ALK G1202R solvent front, EML4-ALK G1202R/L1196M, or EML4-ALK G1202R/L1198F mutations, with IC50 values of approximately 3-10 nM[1].
Zotizalkib (2-10 mg/kg; p.o.; twice a day; for 2 weeks) treatment at 2 mg/kg, 5 mg/kg, and 10 mg/kg resulted in dose-dependent tumor growth inhibition (TGI) of 64%, 120%, and 200% (complete regression), respectively[1].

Reference

[1]. Brion W Murray, et al. TPX-0131, a Potent CNS-Penetrant, Next-Generation Inhibitor of Wild-Type ALK and ALK-Resistant Mutations. Mol Cancer Ther. 2021 Jun 22;molcanther.0221.2021.
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