参考文献:
MERCK FROSST CANADA LTD. ISABEL, Elise LACHANCE, Nicolas LECLERC, Jean-Philippe LEGER, Serge OBALLA, Renata, M. POWELL, David RAMTOHUL, Yeeman, K. ROY, Patrick TRANMER, Geoffrey, K. ASPIOTIS, Renee LI, Lianhai MARTINS, Evelyn Patent: WO200/9426 A, 200 Location in patent: Page/Page column 32 WO 200/09426 A