Optimization of Extraction Process for Total Flavonoids from Toona sinensis and Effects of Variety and Harvest Period on Its Content and Antioxidant Activity

• ZHAO Xiaowang, 
• HU Yifan, 
• ZUO Wendan, 
• CHEN Haowen, 
• DOU Qiuyu, 
• LUO Jialin, 
• TIAN Hao, 
• FAN Yuanhong