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Judd; Dowle; Middlemiss; Scopes; Ross; Jack; Pass; Tranquillini; Hobson; Panchal; Stuart; Paton; Hubbard; Hilditch; Drew; Robertson; Clark; Travers; Hunt; et al. Journal of Medicinal Chemistry, 1994 , vol. 37, # 19 p. 3108 - 3120