Fortunella polyandra (Ridl) Tanaka or Malayan kumquat, is a family of Rutaceae from Malaysia known for its various active compounds, especially flavonoids. This study aims to verify the optimum condition and correlation leaves extract in by ultrasound-assisted extraction (UAE) antioxidant activities apigenin 7-O-neohesperidoside (rhoifolin) contents using response surface methodology (RSM). Cen...