(19)

(11)

EP 4 288 441 A1

(12)

(43) Date of publication: 13.12.2023 Bulletin 2023/50 (21) Application number: 22750319.0 (22) Date of filing: 02.02.2022

(51) International Patent Classification (IPC):  C07D 487/04(2006.01) (52) Cooperative Patent Classification (CPC): C07D 487/04; A61K 31/519 (86) International application number: PCT/US2022/014929 (87) International publication number: WO 2022/169864 (11.08.2022 Gazette 2022/32)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 05.02.2021 US 202163146139 P (71) Applicant: PTC Therapeutics, Inc. South Plainfield, NJ 07080 (US)	(72) Inventors: ARACHCHILAGE, Gayan Mirihana Plainfield, New Jersey 07080 (US) ARNOLD, Michael A. Plainfield, New Jersey 07080 (US) BARRAZA, Scott Plainfield, New Jersey 07080 (US) BHATTACHARYYA, Anuradha Plainfield, New Jersey 07080 (US) KARP, Gary Mitchell Plainfield, New Jersey 07080 (US) (74) Representative: Dennemeyer & Associates S.A.  Postfach 70 04 25 81304 München 81304 München (DE)