It is resemble that flos lonicerae xianglei extracts scavenge hydroxyle free radical, howere, scavenging action of 70% ethanol extract is beyond of water extract and 95% ethanol extract, and is worse than mannitol.

• 湘蕾金银花水提物、70%25醇提物和9596醇提物均对·OH有清除作用，而清除作用最强的为70%25醇提物，其次为水提物和95%25醇提物； 同溶剂提取物中，湘蕾金银花的清除效果与灰毡毛相当，强于济银花；