Penetration of transdermal enhancers on percutaneous permeation of Sinomenine Gels in vitro Determination of percutaneous absorption characteristics of Panax notoginseng saponins transfersomes by in vitro skin permeation method Determination of in vitro release rule of new type Shangshi Zhitong Plaster Determination of in vitro release rule of new type Shangshi Zhitong Plaster