申请人:US GOV HEALTH & HUMAN SERV
                            
                            
                                公开号:WO2004038006A2
                            
                            
                                公开(公告)日:2004-05-06
                            
                            Disclosed are purine nucleoside compounds that are selective to A3 adenosine receptors and are useful for the treatment of cancer and inflammatory diseases. The compounds are shown by the following general formula (I), including isomers thereof: wherein X is sulfur or oxygen; Rl is hydrogen, alkyl, benzyl, halobenzyl, or phenylalkyl; R2 is hydrogen, halogen, alkoxy, alkenyl, alkynyl, alkylthio, or thio; R3 and R3' are hydrogen, hydroxyalkyl, alkoxycarbonyl, or alkylaminocabonyl, whereas R3 and R3' do not have identical substituents simultaneously; and R4 is hydrogen or alkyl. Also disclosed are a pharmaceutical composition comprising a compound of formula (I), an isomer, or its pharmacologically acceptable salt as an active ingredient and a method for preventing or treating various diseases, state, or condition, including asthma, inflammation, cerebral ischemia, heart diseases, and cancer.