Study of TL117 in Patients With Recurrent or Metastatic Head and Neck Squamous Cell Carcinoma

Inclusion Criteria:

1. 18-70 years old for Phase 1a, 18-75 years old for Phase 1b and 2;
2. Histologically and/or cytologically confirmation of recurrent/metastatic squamous cell carcinoma of the head and neck;
3. At least one evaluable or measurable tumor lesion;
4. Adequate performance status;
5. A minimum life expectancy of \> 3 months;
6. Adequate cardiac, kidney, and liver function;
7. Willingness of all subjects of childbearing potential to use acceptable methods of birth control;

Exclusion Criteria:

1. Any chemotherapy, radiotherapy, targeted therapy, immunotherapy, endocrine therapy and other systematic anti-tumor therapies within 4 weeks prior to the first dose of the study drug (some exceptions apply)
2. Prior or current PI3K inhibitor therapy;
3. Type 1 or type 2 diabetes requiring antihyperglycemic medication;
4. Major organ surgery (excluding needle biopsy) or significant trauma within 4 weeks prior to the first dose, or required elective surgery during the study period;
5. Any unresolved toxicities from prior therapy greater than Grade 1;
6. Inability to swallow, or serious gastrointestinal absorption conditions;
7. History of immunodeficiency;
8. Active central nervous system metastases;
9. Active hepatitis B or C virus infection;
10. Uncontrolled active infection;
11. Serious cardiovascular disease；
12. Clinically uncontrollable effusion in the third space;
13. Known allergy and/or contraindications to paclitaxel;
14. Known alcohol or drug dependence;
15. Mental disorders or poor compliance;
16. Pregnant or lactating women;