(19)

(11)

EP 4 568 962 A2

(12)

(88) Date of publication A3: 28.03.2024 (43) Date of publication: 18.06.2025 Bulletin 2025/25 (21) Application number: 23853472.1 (22) Date of filing: 08.08.2023

(51) International Patent Classification (IPC):  C07D 419/14(2006.01) A61P 43/00(2006.01) A61K 31/4365(2006.01) (52) Cooperative Patent Classification (CPC): A61K 31/4365 (86) International application number: PCT/US2023/071833 (87) International publication number: WO 2024/036143 (15.02.2024 Gazette 2024/07)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 09.08.2022 US 202263370902 P (71) Applicant: PTC Therapeutics, Inc. Warren, NJ 07059 (US)	(72) Inventor: LI, Wencheng Plainfield, New Jersey 07080 (US) (74) Representative: Nederlandsch Octrooibureau  P.O. Box 29720 2502 LS The Hague 2502 LS The Hague (NL)