参考文献

PURDUE PHARMA L.P.; NI, Chiyou; SHAO, Bin; TAFESSE, Laykea; YAO, Jiangchao; YU, Jianming; ZHOU, Xiaoming Patent: WO2012/35421 A2, 2012 ; Location in patent: Page/Page column 178 ; WO 2012/035421 A2