HMPL-523 Food Effect and Proton Pump Inhibitor Study

This study will be a single-center, open-label, 4-period, randomized,6-sequence study conducted with 24 healthy male or female subjects. The study will consist of a Screening Phase (Screening and Day -1), a Treatment Phase (Periods1, 2, 3,and 4), and an End of Study (EOS) Phase. Screening must occur within 28 days before the first study drug administration. There will be a washout of at least 7days between 4 administrations of HMPL-523.Subjects in Periods 1, 2, and 3 will be randomized into 1 of 6 treatment sequences, with all subjects then receiving the same treatment in Period 4.