ZN6168

(1) To evaluate the safety and tolerability of single-dose ZN6168 tablets, pharmacokinetic characteristics, and the effect of food on pharmacokinetics in healthy subjects. (2) To evaluate the safety and tolerability of multiple-dose ZN6168 tablets, pharmacokinetic characteristics, and drug metabolism studies in healthy subjects. (3) To evaluate the safety and tolerability of single-dose and multiple-dose ZN6168 tablets combined with ritonavir, pharmacokinetic characteristics, and drug metabolism studies in healthy subjects.