%0 Journal Article %T HPLC Method Determination of Isoliquiritin Apioside and Isoliquiritin in Rat Plasma for Application in Pharmacokinetic Study after an Oral Administration of Zhigancao Extract %A Yan-yun Yang %A Liang Xu %A Song-yao Hao %A Yan Li %J Journal of Analytical Methods in Chemistry %D 2012 %I Hindawi Publishing Corporation %R 10.1155/2012/364013 %U http://dx.doi.org/10.1155/2012/364013