[1]School of Pharmacy Shenyang Pharmaceutical University No.103 Wenhua Road Shenyang 110016 China;
[2]HAISCO(Shenyang)Pharmaceutical Co.Ltd. Shenyang China;
[3]School of Pharmacy BioMolecular Sciences Department The University of Mississippi Oxford MS 38677 USA;
[4]School of Continuing Education Shenyang Pharmaceutical University No.103 Wenhua Road Shenyang 110016 China;
Oleanolic acid; Polymeric nanoparticles; mPEG-PCC-VE; Oral delivery;