Romines, Karen R.; Freeman, George A.; Schaller, Lee T.; Cowan, Jill R.; Gonzales, Steve S.; Tidwell, Jeffrey H.; Andrews III, Clarence W.; Stammers, David K.; Hazen, Richard J.; Ferris, Robert G.; Short, Steven A.; Chan, Joseph H.; Boone, Lawrence R.
Journal of Medicinal Chemistry, 2006 , vol. 49, # 2 p. 727 - 739

Nyegaard and Co. A/S
Patent: US4423047 A1, 1983 ;