(19)
(11) EP 4 770 752 A1

(12)

(43) Date of publication:
08.07.2026 Bulletin 2026/28

(21) Application number: 24773576.4

(22) Date of filing: 27.08.2024
(51) International Patent Classification (IPC): 
A61P 31/20(2006.01)
C07D 417/04(2006.01)
A61K 31/496(2006.01)
(52) Cooperative Patent Classification (CPC):
C07D 417/04; A61P 31/20; A61K 31/513; A61K 45/06; A61P 31/22
(86) International application number:
PCT/IB2024/058309
(87) International publication number:
WO 2025/046456 (06.03.2025 Gazette 2025/10)
(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:
GE KH MA MD TN

(30) Priority: 28.08.2023 US 202363579070 P

(71) Applicant: Assembly Biosciences, Inc.
South San Francisco, CA 94080 (US)

(72) Inventors:
  • ZONG, Zhixin
    San Francisco, California 94080 (US)
  • WU, Yi
    San Francisco, California 94080 (US)

(74) Representative: Carpmaels & Ransford LLP 
One Southampton Row
London WC1B 5HA
London WC1B 5HA (GB)

   


(54) A CRYSTALLINE FORM OF 2-(3-(2,,5'-DIFLUORO-[1,1'-BIPHENYL]-4-YL)-2-OXOTETRAHYDROPYRIMIDIN-1(2H)-YL)-4-METHYLTHIAZOLE-5-SULFONAMIDE