In a deal worth up to $1 billion, Ideaya Biosciences Inc. is in-licensing Jiangsu Hengrui Pharmaceuticals Co. Ltd.’s SHR-4849, a phase I DLL3-targeting opo-I-payload antibody-drug conjugate (ADC). Under terms of the deal, San Francisco-based Ideaya will develop and commercialize SHR-4849 worldwide outside of greater China, and Shanghai-based Hengrui is eligible to receive up to $1.04 billion that includes a $75 million up-front fee, $200 million in development and regulatory milestone payments, and commercial success-based milestone payments. Hengrui is also eligible to receive royalties on net sales outside of greater China.