Fisher, Matthew J.; Backer, Ryan T.; Collado, Ivan; De Frutos, Oscar; Husain, Saba; Hsiung, Hansen M.; Kuklish, Steve L.; Mateo, Ana I.; Mullaney, Jeffrey T.; Ornstein, Paul L.; Paredes, Cristina Garcia; O'Brian, Thomas P.; Richardson, Timothy I.; Shah, Jikesh; Zgombick, John M.; Briner, Karin
Bioorganic and Medicinal Chemistry Letters, 2005 , vol. 15, # 22 p. 4973 - 4978

Harpp,D.N. et al.
Journal of Organic Chemistry, 1975 , vol. 40, p. 3420 - 3427

Santen Pharmaceutical Co. Ltd.
Patent: US3971828 A1, 1976 ;