参考文献

BOEHRINGER INGELHEIM INTERNATIONAL GMBH; FANDRICK, Daniel Robert; LU, Zhi-Hui; REEVES, Diane Crimhilda; REEVES, Jonathan Timothy; SENANAYAKE, Chris Hugh; SONG, Jinhua J.; ZHANG, Yongda Patent: WO2012/87720 A1, 2012 ; Location in patent: Page/Page column 26-27 ; WO 2012/087720 A1