Phytochemical Composition, Antioxidant and Xanthine Oxidase Inhibitory Activities of Amaranthus cruentus L. and Amaranthus hybridus L. Extracts

苋菜（Amaranthus cruentus L.）和杂交苋菜（Amaranthus hybridus L.）提取物的植物化学成分、抗氧化活性和黄嘌呤氧化酶抑制活性