The study is to evaluate the safety, tolerability, pharmacokinetic and pharmacodynamic profiles of CS12192 after single or multiple oral administration, as well as the food effect on the pharmacokinetics in healthy subjects.

This study consists of 3 parts: single ascending dose (SAD), multiple ascending dose (MAD) and food effect (FE). Both SAD and MAD study are randomized, double-blind, placebo-controlled design. The FE study use a randomized, open-label, two-period, two-crossover design.

Inclusion Criteria:

• Healthy subjects, both male and female.
• Between18 and 45 years of age (inclusive) at screening visit.
• BMI between 19.0-26.0 kg/m2 (including critical value) at screening visit and baseline visit, male subjects' body weight ≥ 50 kg, female subjects' body weight ≥45 kg.
• All subjects and female partners of male agree to use medically recognized effective contraceptive measures (including physical contraception, surgical contraception, abstinence, etc.) from the start of signing informed consent form to 3 months after the last dose.
• Subjects voluntarily participate in the study and sign informed consent form.

Exclusion Criteria:

• History of clinically significant drug allergy or atopic allergic diseases (asthma, urticaria, eczematous dermatitis) or drug allergy to investigational products or similar investigational products.
• History of cardiovascular system, endocrine system, nervous system disease or lung, hematological, immunological, psychiatric diseases and metabolic abnormalities.
• History or surgical history of gastrointestinal, hepatic, or renal disease that can affect drug absorption or metabolism within 6 months prior to the screening visit (except uncomplicated appendectomy and hernia repair).
• History of active tuberculosis, or positive tuberculosis screening at screening visit.
• History of any recurrent bacterial, fungal or viral infections (≥3 attacks in the past year, except the common cold), or active infections requiring treatment at screening visit, or history of infection requiring intravenous anti-infective drugs or hospitalization ≤8 weeks before randomization, or history of infection requiring oral anti-infective drugs ≤2 weeks before randomization.
• Uncured diarrhea before randomization, or history of diarrhea within 7 days before planning dosing.
• Use of any prescription drugs, over-the-counter drugs, any vitamin products or Chinese herbal medicines within 1 month before randomization.
• History of drug abuse.
• Inability to tolerate venipuncture, or history of fainting or halo.
• Participation in interventional clinical study (device or drug) within 3 months prior to randomization, or taking investigational product within 3 months prior to randomization , or remaining within 5 half-lives of drug, whichever is longer.
• Blood donation or significant blood loss (>300 mL) within 3 months prior to randomization.
• Pregnant or lactating females, or female subjects with serum pregnancy test human chorionic gonadotropin (HCG) ≥5 mIU/mL.
• History of regular alcohol consumption, drinking more than 7 cups per week for females or 14 cups per week for males (1 cup= 100 mL wine = 285 mL beer = 25 mL spirits) within 3 months before randomization; or taking any products containing alcohol within 48 hours before the first dose; or having a positive alcohol breath test before randomization.
• Smoking more than 5 cigarettes or equivalent per day within 3 months prior to randomization or inability to refrain from smoking during the trail.
• Excessive consumption of tea, coffee or caffeinated beverages (more than 8 cups) per day within 14 days before randomization, or tea, coffee, caffeinated beverages or foods within 48 hours before randomization.
• Consumption of grapefruit or beverages or foods containing its ingredients within 14 days before randomization.
• Glomerular filtration rate (eGFR) <80 mL/min at screening visit and baseline visit (calculating by using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation for serum creatinine, age, and sex).
• Abnormal results in medical history inquiry, vital signs, physical examination, chest X-ray, and clinical laboratory tests are clinically significant.
• QTcF≥450 ms or other clinically significant abnormality as judging by the investigator on 12-lead ECG at screening visit and baseline visit.
• Human immunodeficiency virus antibody (HIV) cannot provide negative reports at screening visit.
• Syphilis serology, hepatitis B virus surface antigen (HBsAg), hepatitis B virus-DNA quantification, or hepatitis C virus antibody (HCV-Ab) positive at screening visit.
• Positive urine drug screening (morphine, methamphetamine, ketamine, ecstasy, marijuana, cocaine) before randomization.
• Need or plan to engage in strenuous physical activity or exercise during the study.
• Inability to tolerate high-fat and high-fever meal (only for fed study).
• Subjects with dysphagia.
• Other conditions considered inappropriate for participation in the study by the investigator.