An open study to evaluate the safety of apatinib mesylate (YN968D1) 1,000mg monotherapy in patients with unresectable locally advanced or metastatic Gastric cancer failed to standard therapy.

Inclusion Criteria:

• 19 years of age or older
• Subjects with histologically confirmed unresectable locally advanced or metastatic adenocarcinoma of the stomach or gastroesophageal junction
• Failure or noncompliance of existing standard treatment without alternative treatment
• Measurable disease measured by proper image examination defined by RECIST 1.1
• Life expectancy ≥ 3 months
• Subject must be suitable for oral administration of study medication
• Subject who can submit a written consent form before participating in the test
• Adequate bone marrow, renal, and liver function
• Electrocorticography(ECOG) performance status ≤ 2
• Ability and willingness to comply with the study protocol for the duration of the study

Exclusion Criteria:

• Pregnant or lactating women
• Therapy with clinically significant systemic anticoagulant or antithrombotic agents within 7 days prior to first scheduled dose of YN968D1
• Hemoptysis within 3 months prior to first scheduled dose of YN968D1
• Cytotoxic chemotherapy, immunotherapy, radiotherapy or other targeted therapies within 4 weeks (6 weeks in cases of mitomycin C, nitrosourea, lomustine) prior to first scheduled dose of YN968D1
• Surgery or biopsy within 28 days prior to first scheduled dose of YN968D1
• Minor surgery within 7 days prior to first scheduled dose of YN968D1
• Patients who have experience using YN968D1 before
• Concomitant treatment with strong inhibitors or inducers of CYP3A4, CYP2C9 and CYP2C19
• Known history of human immunodeficiency virus infection (HIV)
• Medical history of other cancers (including blood cancer) in the 5 years
• Radiology therapy to target lesion within 28 days, or diagnosis of other cancer within 14 days prior to first scheduled dose of YN968D1
• History of bleeding diathesis or bleeding within 14 days prior to enrollment
• Medical history of clinically significant thrombosis (bleeding or clotting disorder) within the past 3-months
• History of non-malignant GI bleeding, gastric stress ulcerations, or peptic ulcer disease within the past 3-months
• History of idiopathic or hereditary angioedema, sickle cell or any hemolytic anemia
• History of uncontrolled hypertension that in the opinion of the investigator
• Complete Left bundle branch block (LBBB) or bifascicular (RBBB and left anterior or posterior hemi-block)
• Clinically significant S-T segment or T wave abnormality
• Abnormal atrial fibrillation
• History of ECOG or left ventricular ejection fraction (LVEF) abnormality during last 3 months in the opinion of the investigator
• Myocardial infarction or unstable angina pectoris within 6 months prior to starting study medication
• Congestive heart failure (New York Heart Association class III-IV)
• History of other significant cardiovascular disease or vascular disease within the last 6 months
• History of clinically significant glomerulonephritis, biopsy proven tubulointerstitial nephritis, crystal nephropathy, or other renal insufficiencies Treatment with an investigational agent within the longest time frame of either 5 half-lives or 30 days of initiating study drug
• Half-life of other investigator drug is not passed over fivefold or 30 days prior to clinical trial
• Known recreational substance use or psychiatric illness that, in the opinion of the Investigator, may affect compliance with scheduled visits
• Known hypersensitivity to YN968D1 or components of the formulation