c-MET Inhibitor in Advanced Solid Tumors With c-MET Gene Aberration

Inclusion Criteria:

1. Informed consent for KOSMOS-II master observation study

2. Male or female ≥19 years of age

3. Histologically confirmed advanced solid cancers who harboring c-MET alterations (patients who performed NGS tests and c-MET alterations confirmed in molecular tumorboard [MTB]) - exon 14 skipping mutation except for non-small cell lung cancer (NSCLC)

• c-MET amplification GCN (gene copy no.) ≥6 by NGS

• Fluorescence/Silver In situ hybridization (FISH/SISH) result of the MET/CEP7ratio ≥2

• Other MET alterations that are regarded to be actionable by the KOSMOS MTB

4. Disease progression during or after standard therapy and without further treatmentoptions, or no standard therapy, or ineligible for standard therapy

5. At least one measurable or evaluable lesion based on Response Evaluation Criteria inSolid Tumors (RECIST) version 1.1

6. Eastern Cooperative Oncology Group Performance Status 0-2

7. Capable to eat food

8. Adequate organ functions

×109/L by International -Unit [IU]); excluding measurements obtained within 7 days after administrationof granulocyte colony stimulating factor (G-CSF)

• Platelet count ≥75000/mm3 (IU: ≥75×109/L); excluding measurements obtainedwithin 7 days after transfusion of platelets.

• Hemoglobin value of ≥8.0 g/dL

• AST/ALT ≤3×upper limit of normal (ULN); if liver function abnormalities are dueto underlying liver metastasis, AST / ALT ≤5×ULN

• Total serum bilirubin of ≤1.5×ULN

• Creatinine clearance (CrCl) of ≥50 mL/min (MDRD)

9. Have a life expectancy of at least 90 days

10. If not menopausal or surgically sterile, willing to practice at least one of thefollowing highly effective methods of birth control for at least a (partner's)menstrual cycle before and for 3 months after study drug administration:

• Barrier type devices (examples are condom, diaphragm, and contraceptive sponge)used only in combination with a spermicide

• Sexual intercourse with vasectomized male/sterilized female partner

• Hormonal female contraceptive (oral, parenteral, intravaginal, implantable, ortransdermal) for at least 3 consecutive months prior to investigational productadministration (when not clinically contraindicated as in breast, ovarian andendometrial cancers)

• Use of an intrauterine contraceptive device

• Note: Abstinence, the rhythm method, and/or contraception by the partnerare not acceptable methods of birth control

11. Willing to provide available tissue specimens and consent to blood collection forevaluation of biomarkers

• Archival tissue specimens: formalin-fixed, paraffin-embedded tissues

• Optional fresh tissue collection prior to ABN401 administration

Exclusion Criteria:

1. Previous treatment with c-MET inhibitor

2. NSCLC with c-MET exon 14 skipping mutation

3. Previous hypersensitivity reaction to any component of study drugs

4. Presence or history of arrhythmia

5. Past history of

① Major surgery within 4 weeks before study (must have complete recovery fromsurgical complications)

② Radiotherapy within 4 weeks before study or limited radiotherapy within 2 weeks

③ Chemotherapy or biologic agents within 3 weeks before study (targeted therapywithin 2 weeks and mitomycin within 5 weeks)

6. History of the following medical conditions

• Active central nervous system (CNS) metastasis (clinically unstable afterstopping steroid for more than 2 months)

• Leptomeningeal metastasis

• Acute systemic infection

• Acute myocardial infarction, stable/unstable angina, symptomatic heart failure ((New York Heart Association [NYHA] class III or IV within the previous 6months; if >6 months cardiac function must be within normal limits and thepatient must be free of cardiac-related symptoms)

• Clinically critical chronic vomiting or diarrhea

• Uncontrolled hypertension (systolic blood pressure >150mmHg diastolic bloodpressure>100mmHg)

• Proteinuria (urine dipstick or 24-hour urine collection > 1.0g): must have 24-hour urine collection if baseline urine dipstick ≥2+

• Active HBV/ HCV except for

• HBsAg (+) with undetectable HBV DNA

• If HBsAg (+) and HBV DNA (+), chronic state of infection and clinicallystable after anti-viral therapy for more than 3 months

• If IgG anti-HBc (+) and past history of HBV infection, undetectable HBVDNA

• HCV Ab (+) with undetectable HCV RNA

• Severe psychiatric disorders

• Concurrent anticoagulants at therapeutic dose

• Past history of gastrointestinal perforation or fistula within 3 months beforestudy, grade 3 or 4 of gastrointestinal bleeding/varix

7. Toxicity with prior therapy (> grade 1) (except for alopecia, pigmentation, poororal intake), and neuropathy (> grade 1)

8. Pregnant or breastfeeding

9. Patients with a corrected QT interval (using Fridericia's correction formula) (QTcF)of > 470 msec