A Study of Orally Administered ZM-H1505R to Evaluate Safety, Tolerability and Pharmacokinetics After Single and Multiple Ascending Doses in Healthy Participants

Single oral doses of 300, 450, 600, 750, and 900 mg of ZM-H1505R or placebo and multiple oral doses of 450, 600, and 750 mg of ZM-H1505R or placebo will be administered in a fasted state, or in the case of Cohort 3 (Part 1), a second dose of 600 mg will be administered in the fed state. During each SAD and MAD dosing period, 2 subjects in each cohort will receive placebo instead of ZM-H1505R. The dose levels may be adjusted based on the safety and tolerability obtained from the previous cohort.