Utidelone Combined With Bevacizumab in the Treatment of ≥ 2 Lines of HER-2 Negative Advanced Breast Cancer

Patients who have progressed on prior bevacizumab；

Patients who have previously used Utidelone, and the interval is less than 6 months from the end of medication；

Less than 3 weeks after radiotherapy or chemotherapy; less than 1 week after endocrine therapy；

Concomitant diseases/medical history； （1）Clinically significant hemoptysis (with daily hemoptysis of more than 50 ml) within 3 months before enrollment; or clinically significant bleeding symptoms or definite bleeding tendency, such as gastrointestinal bleeding, hemorrhagic gastric ulcer, fecal occult blood or greater at baseline, or suffering from vasculitis； （2）Patients with arteriovenous thrombotic events within 6 months before enrollment, such as cerebrovascular accident (including transient ischemic attack), deep venous thrombosis (except resolved venous thrombosis caused by previous chemotherapy, which has been judged by the investigator) and pulmonary embolism； （3）Hypertension not adequately controlled with antihypertensive therapy (systolic blood pressure > 140 mmHg or diastolic blood pressure > 90 mmHg); Randomization occurs within 6 months as follows: myocardial infarction, severe/unstable angina, NYHA Class 2 or greater, clinically significant supraventricular or ventricular arrhythmia, and symptomatic congestive heart failure （4）Interstitial lung disease, pneumonitis, or uncontrollable systemic disease (e.g., diabetes, pulmonary fibrosis, acute pneumonitis, etc.； （5）Renal insufficiency: urine routine showed urine protein ≥ + +, or 24 h urine protein ≥ 1.0g was confirmed； （6）History of attenuated live vaccine within 28 days before the first dose of study drug or anticipated vaccination with live attenuated vaccines during the study （7）Human immunodeficiency virus (HIV) infection or known acquired immunodeficiency syndrome (AIDS); active hepatitis (hepatitis B, defined as HBV-DNA ≥ 500 IU/ml; hepatitis C, defined as HCV-RNA above the lower limit of detection of the analytical method) or co-infection with hepatitis B and C； （8）Presence of severe infection within 4 weeks before administration, including but not limited to bacteremia requiring hospitalization, severe pneumonia, etc. Active infection with CTCAE 5.0 ≥ grade 2 requiring systemic antibiotic therapy within 2 weeks before the first dose, or unexplained fever > 38.5 ° C during the screening period/before the first dose (fever due to tumor causes may be included if judged by the investigator); evidence of active tuberculosis infection within 1 year before dosing.