ACTELION PHARMACEUTICALS LTD
Patent: WO2009/69100 A1, 2009 ;
Location in patent: Page/Page column 65 ;
WO 2009/069100 A1

Parlow, John J.; Burney, Mary W.; Case, Brenda L.; Girard, Thomas J.; Hall, Kerri A.; Harris, Peter K.; Hiebsch, Ronald R.; Huff, Rita M.; Lachance, Rhonda M.; Mischke, Deborah A.; Rapp, Stephen R.; Woerndle, Rhonda S.; Ennis, Michael D.
Journal of Medicinal Chemistry, 2010 , vol. 53, # 5 p. 2010 - 2037

Stewart et al.
Journal of Organic Chemistry, 1948 , vol. 13, p. 134,138