Iridoid glycosides from Morinda officinalis How. exert anti-inflammatory and anti-arthritic effects through inactivating MAPK and NF-κB signaling pathways oleh Qi Zhang, Jian-hua Zhang, Yu-qiong He, Quan-long Zhang, Bo Zhu, Yi Shen, Meng-qin Liu, Lu-lin Zhu, Hai-liang Xin, Lu-ping Qin, Qiao-yan Zhang