参考文献:
BOEHRINGER INGELHEIM INTERNATIONAL GMBH BARTOLOZZI, Alessandra BOSANAC, Todd CHEN, Zhidong DE LOMBAERT, Stephane DINES, Jonathon, Alan HUBER, John, D. LIU, Weimin LOKE, Pui Leng MORWICK, Tina, Marie OLAGUE, Alan RIETHER, Doris TYE, Heather WU, Lifen ZINDELL, Renee, M. Patent: WO/439 A, Location in patent: Page/Page column 7-7 WO /439 A