Comparative study on absorption of Luodian Borneolum and muscone after nasal unidirectional perfusion with different Xingnaojing preparations in rats X-ray Diffraction analysis with Fourier pattern of Qingdai Powder Enhancing effect of Borneolum Syntheticum and Acori Talarinowii Rhizoma on penetrating blood-brain barrier of hydroxysafflor yellow A Enhancing effect of Borneolum Syntheticum and Acori Talarinowii Rhizoma on penetrating blood-brain barrier of hydroxysafflor yellow A