参考文献:
EXELIXIS, INC. IBRAHIM, Mohamed, Abdulkader JEONG, Joon, Won JOHNSON, Henry William, Beecroft KEARNEY, Patrick LEAHY, James, W. LEWIS, Gary, L. NOGUCHI, Robin, Tammie NUSS, John, M. Patent: WO1/48 A1, 1 Location in patent: Page/Page column 87-88 WO 1/48 A1