参考文献:
Gruenenthal GmbH FRANK, Robert BAHRENBERG, Gregor CHRISTOPH, Thomas LESCH, Bernhard LEE, Jeewoo Patent: US2/29962 A, 2 Location in patent: Paragraph 79
参考文献:
Duan, Maosheng Kazmierski, Wieslaw M. Chong, Pek Y. DeAnda, Felix Edelstein, Mark Ferris, Rob Peckham, Jennifer Wheelan, Pat Xiong, Zhiping Zhang, Huichang Nishizawa, Rena Takaoka, Yoshikazu Bioorganic and Medicinal Chemistry Letters, 2 , vol. 2, # 2 p. 647 - 6475