Pharmacokinetics and tissue distribution of monotropein and deacetyl asperulosidic acid after oral administration of extracts from Morinda officinalis root in rats oleh Yi Shen, Qi Zhang, Yan-bin Wu, Yu-qiong He, Ting Han, Jian-hua Zhang, Liang Zhao, Hsien-yeh Hsu, Hong-tao Song, Bing Lin, Hai-liang Xin, Yun-peng Qi, Qiao-yan Zhang