Assessing the Safety and Efficacy of PLB1004 in Patients With Advanced Non-Small Cell Lung Cancer (NSCLC)

Inclusion Criteria:

1. Ability to understand and the willingness to sign a written informed consent document；
2. Aged at least 18 years old;
3. Histologically or cytologically confirmed advanced non-small cell lung cancer;
4. Patients with EGFR or HER2 mutations;
5. ECOG Performance Status of 0-2;
6. Life expectancy is not less than 12 weeks;
7. At least one measurable lesion as defined by RECIST1.1;

Exclusion Criteria:

1. For the Dose Expansion Part: Patients who have received prior treatment with Poziotinib or TAK788 or other EGFR/HER2 exon20 insertion inhibitors should be excluded；
2. Any cytotoxic drugs or other anticancer drugs from a previous treatment regimen within 14 days prior to the first dose of PLB1004；
3. Major surgery (e.g., intra-thoracic, intra-abdominal or intra-pelvic) within 4 weeks prior (2 weeks for resection of brain metastases) to starting PLB1004 or who have not recovered from side effects of such procedure;
4. Thoracic radiotherapy to lung fields ≤ 4 weeks prior to starting PLB1004. For all other anatomic sites (including radiotherapy to thoracic vertebrae and ribs), radiotherapy ≤ 2 weeks prior to starting PLB1004 or patients who have not recovered from radiotherapy-related toxicities. Palliative radiotherapy for bone lesions ≤ 2 weeks prior to starting PLB1004 is allowed;
5. Patients receiving treatment with medications that meet one of the following criteria and that cannot be discontinued at least 1 week prior to the start of treatment with PLB1004 and for the duration of the study:

   * Strong inhibitors of CYP3A4
   * Strong inducers of CYP3A4
   * Inducers or inhibitors of P-gp
6. Patients with symptomatic central nervous system (CNS) metastases who are neurologically unstable or have required increasing doses of steroids within the 2 weeks prior to study entry to manage CNS symptoms;
7. Clinically significant, uncontrolled heart diseases;
8. Presence or history of a malignant disease other than NSCLC that has been diagnosed and/or required therapy within the past 3 years. Exceptions to this exclusion include the following: completely resected basal cell and squamous cell skin cancers, indolent malignancies that currently do not require treatment, and completely resectedcarcinoma in situ of any type;
9. Past medical history of interstitial lung disease, drug-induced interstitial lung disease, radiation pneumonitis which required steroid treatment, or any evidence of clinically active interstitial lung disease;
10. History of hypersensitivity to active or inactive excipients of PLB1004 or drugs with a similar chemical structure or class to PLB1004;
11. Pregnant or nursing women;
12. Judgment by the investigator that the patient should not participate in the study if the patient is unlikely to comply with study procedures, restrictions and requirements;