ALK-2403

Primary objectives: 1. To evaluate the safety and tolerability of single and multiple oral doses of ALK2403 tablets in healthy participants; 2. To evaluate the effect of food (high-fat, high-calorie meals) on the pharmacokinetics of ALK2403 tablets. Secondary objectives: 1. To evaluate the pharmacokinetic characteristics of single and multiple oral doses of ALK2403 tablets in healthy participants; 2. To evaluate the metabolic and excretion characteristics of ALK2403 tablets in healthy participants; 3. To evaluate the effect of a single dose of ALK2403 tablets on the QTc interval in healthy participants; 4. To evaluate the safety and tolerability of oral administration of ALK2403 tablets after a meal (high-fat, high-calorie meal) in healthy participants.