Title: Dual M3 antagonists-PDE4 inhibitors. Part 2: Synthesis and SAR of 3-substituted azetidinyl derivatives.
Journal: Bioorganic & medicinal chemistry letters 20070601
Title: First dual M3 antagonists-PDE4 inhibitors: synthesis and SAR of 4,6-diaminopyrimidine derivatives.
Journal: Bioorganic & medicinal chemistry letters 20060401