SmithKline Corporation
Patent: US3985896 A1, 1976 ;

Quasdorf, Kyle W.; Antoft-Finch, Aurora; Liu, Peng; Silberstein, Amanda L.; Komaromi, Anna; Blackburn, Tom; Ramgren, Stephen D.; Houk; Snieckus, Victor; Garg, Neil K.
Journal of the American Chemical Society, 2011 , vol. 133, # 16 p. 6352 - 6363