Under the agreement, Hansoh Pharma has granted Merck an exclusive global license to develop, manufacture and commercialize HS-10535. Hansoh Pharma will receive an upfront payment of $112 million and is eligible to receive up to $1.9 billion in milestone payments associated with the development, regulatory approval and commercialization of the candidate, as well as royalties on sales.

Hansoh Pharma may co-promote or solely commercialize HS-10535 in China subject to certain conditions. Merck will record a pre-tax charge of $112 million, or $0.04 per share, to be included in GAAP and non-GAAP results in the fourth quarter of 2024.