参考文献:
BRISTOL-MYERS SQUIBB COMPANY WROBLESKI, Stephen T. JAGABANDHU, Das DOWEYKO, Lidia M. GUO, Junqing HYNES, John JIANG, Bin KEMPSON, James LIN, Shuqun SPERGEL, Steven H. TOKARSKI, John S. WU, Hong YANG, Bingwei Vera Patent: WO/5887 A, Location in patent: Page/Page column 8-9 WO /5887 A