Pharmacokinetic Study of Borneol and Menthol in Rats after Oral Administration of Qingyan Drop Pills - Xu, Xuefang; Li, Yubo; Hou, Jipeng; Zhang, Shaozhuo; Xu, Yanyan; Wang, Yang; Zhang, Yanjun; Liu, Changxiao; He, Xin (Planta Medica, 2011)