参考文献
Boehringer Ingelheim International GmbH; Liu, Li; Akalay, Deniz; Dong, Weitong; Feng, Jianqing; Hemp, Christian Wolfgang; Lu, Jun; Xie, Le; Yang, Jinsong
Patent: US2014/135497 A1, 2014 ;
Location in patent: Paragraph 0055; 0056; 0057; 0058; 0059 ;