Keywords Polysaccharide;Extraction;Dioscorea bulbifera L;Chinese Angelica compounds;Hedyotis diffusa Willd;Scutellrla barbata D.Don compounds;Anti-tumor activity;

• 多糖;提取;黄药子;当归;白花蛇舌草;半枝莲;抗肿瘤活性;