Chiauranib Plus Weekly Paclitaxel in Patients with Platinum-refractory or Platinum-resistant Recurrent Ovarian Cancer

50mg orally once daily

50mg orally once daily

at the first cycle, 60mg/m2, i.v infusion on day 1, 8 and 15 ; at the begining of the second cycle, after a comprehensive assessment , investigators decide whether to increase the dosage to 80mg/m2, i.v infusion on day 1, 8 and 15 ;