| Purpose | A TGF-β type I receptor (ALK5) inhibitor | 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
                                                                                    | Characteristics | A TGF-beta type I receptor (ALK5) inhibitor. Inhibits ALK5 autophosphorylation (IC50 = 4 nM). Can replace one of the four reprogramming factors Sox-2. RepSox has been successfully used in the direct reprogramming of mouse fibroblasts through induction of Nanog transcription. | 
                                                                                                                                                                                                                                                            
                                                                                    | Purity | ≥ 98 % by HPLC | 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
                                                                                    | Chemical Name | 2-[3-(6-Methyl-2-pyridinyl)-1H-pyrazol-4-yl]-1,5-naphthyridine; E-616452 | 
                                                                                                                                                                
                                                                                    | Formula | C₁₇H₁₃N₅ | 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
                                                                                    | Permeability | Cell-permeable | 
                                                                                                                                                                                                                                                            
                                                                                    | Solubility | DMSO (>20 mg/ml) |