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(11)

EP 4 196 220 A1

(12)

(43) Date of publication: 21.06.2023 Bulletin 2023/25 (21) Application number: 21791479.5 (22) Date of filing: 09.10.2021

(51) International Patent Classification (IPC):  A61P 9/00(2006.01) A61K 31/506(2006.01) C07D 401/14(2006.01) A61K 31/4439(2006.01) A61P 11/00(2006.01) C07D 413/14(2006.01) (52) Cooperative Patent Classification (CPC): C07D 401/14; C07D 413/14; A61K 31/506; A61P 9/00; A61P 11/00; A61K 31/4545; A61K 31/53; A61K 31/5377 (86) International application number: PCT/IB2021/059266 (87) International publication number: WO 2022/034568 (17.02.2022 Gazette 2022/07)

(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 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: 11.08.2020 WO PCT/CN2020/108325 (71) Applicant: Viva Star Biosciences Limited Causeway Bay, Hong Kong (HK)	(72) Inventors: CHEN, Ping Shanghai 201201 (CN) CAI, Zhenwei Shanghai 201201 (CN) JIANG, Fei Shanghai 201208 (CN) SUN, Peihua Shanghai 200241 (CN) ZHANG, Hongjian Plainsboro, New Jersey 08536 (US) (74) Representative: Potter Clarkson  Chapel Quarter Mount Street Nottingham NG1 6HQ Nottingham NG1 6HQ (GB)