CAS Number: NA 
                          Chemical Name: 4-Desmethyl Istradefylline-d3,13C 
                          Molecular Formula: C1813CH19D3N4O4 
                          Molecular Weight: 374.41 
                        
                          CAS Number: 155270-99-8 
                          Chemical Name: Istradefylline 
                          Molecular Formula: C20H24N4O4 
                          Molecular Weight: 384.44