PROBLEM TO BE SOLVED: To provide N-methanocarba adenine nucleosides as a highly potent A3 adenosine receptor agonist.SOLUTION: A nucleoside compound expressed by the formula is provided. In the formula, R1 to R6 represent an alkyl group or the like. The nucleosides are effective for the treatment of inflammation, cardiac ischemia, stroke, asthma, diabetes and cardiac dysrhythmia.COPYRIGHT: (C)2013,JPO&INPIT【課題】非常に有力なA3アデノシン受容体作用薬としての、N-メタノカルバアデニンヌクレオシドの提供。【解決手段】下式のヌクレオシド化合物(式中、R1-R6はアルキル基等を示す。)。該ヌクレオシドは、炎症、心虚血、脳卒中、喘息、糖尿病、及び不整脈)の治療に有効である。【選択図】なし