... 3-Deazacytosines Dennis J. McNamara and P. Dan Cook*+ Warner-LambertlParke-Davis Pharmaceutical Research, Ann Arbor, Michigan 48105. Received May 27, 1986 ... ' Journal of Medicinal Chemistry, 1987, Vol. 30, No. 2 341 Scheme I F;"2 y 2 10 11 IHz F bo H 12 ...