| —— | 
                                        8-(2-bromo-1-hydroxy-1-phenyl-ethyl)-1,3,7-trimethyl-3,7-dihydro-purine-2,6-dione | 
                                        130906-69-3 | 
                                        C16H17BrN4O3 | 
                                        393.24 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        8-bromoacetyl-1,3,7-trimethyl-3,7-dihydro-purine-2,6-dione | 
                                        114303-64-9 | 
                                        C10H11BrN4O3 | 
                                        315.126 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        8-acetyl-1,3,7-trimethyl-3,7-dihydro-1H-purine-2,6-dione | 
                                        67162-82-7 | 
                                        C10H12N4O3 | 
                                        236.23 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        8-(1-hydroxyethyl)-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione | 
                                        61639-76-7 | 
                                        C9H12N4O3 | 
                                        224.219 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        1,3,7-trimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purine-8-carboxylic acid amide | 
                                        172302-06-6 | 
                                        C9H11N5O3 | 
                                        237.218 | 
                                    
                                                                                                                                            
                                        | 2,3,6,7-四氢-1,3,7-三甲基-2,6-二氧代-1H-嘌呤-8-甲腈 | 
                                        8-cyanocaffeine | 
                                        89588-28-3 | 
                                        C9H9N5O2 | 
                                        219.203 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        8-acetyl-1,3-dimethyl-3,7-dihydro-purine-2,6-dione | 
                                        109868-98-6 | 
                                        C9H10N4O3 | 
                                        222.203 |