 
                  
                          CAS Number: 209216-23-9 
                          Chemical Name: Entecavir Monohydrate 
                          Molecular Formula: C12H17N5O4 
                          Molecular Weight: 295.29 
                        
 
                  
                          CAS Number: 1367369-78-5 
                          Chemical Name: 1'-epi-Entecavir 
                          Molecular Formula: C12H15N5O3 
                          Molecular Weight: 277.28 
                        
 
                  
                          CAS Number: 1367369-77-4 
                          Chemical Name: 2-Amino-9-[(1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1,9-dihydro-6H-purin-6-one 
                          Molecular Formula: C12H15N5O3 
                          Molecular Weight: 277.28 
                        
 
                  
                          CAS Number: NA 
                          Chemical Name: 8-Hydroxy Entecavir 
                          Molecular Formula: C12H15N5O4 
                          Molecular Weight: 293.28 
                        
 
                  
                          CAS Number: 1367369-80-9 
                          Chemical Name: 4'-epi-Entecavir 
                          Molecular Formula: C12H15N5O3 
                          Molecular Weight: 277.28 
                        
 
                  
                          CAS Number: 2349444-69-3 
                          Chemical Name: 8-Methoxy Entecavir 
                          Molecular Formula: C13H17N5O4 
                          Molecular Weight: 307.31 
                        
 
                  
                          CAS Number: 649761-24-0 
                          Chemical Name: 6-O-Benzyl-4-dehydroxy-4-dimethylphenylsilyl Entecavir 
                          Molecular Formula: C27H31N5O2Si 
                          Molecular Weight: 485.65