Structure-guided design of substituted aza-benzimidazoles as potent hypoxia inducible factor-1alpha prolyl hydroxylase-2 inhibitors. - Frohn M; Viswanadhan V; Pickrell AJ; Golden JE; Muller KM; Bürli RW; Biddlecome G; Yoder SC; Rogers N; Dao JH; Hungate R; Allen JR (Bioorganic & medicinal chemistry letters, 2008)