(2S,3S,4R,5R)-5-{6-[(Bicyclo[2.2.1]hept-5-en-2-ylmethyl)-amino]-purin-9-yl}-3,4-dihydroxy-tetrahydro-furan-2-carboxylic acid ethylamide                                                                                                                                                              在
                                                                                                                                                                                 
二甲基二环氧乙烷                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (2S,3S,4R,5R)-3,4-Dihydroxy-5-{6-[(3-oxa-tricyclo[3.2.1.0
2,4]oct-6-ylmethyl)-amino]-purin-9-yl}-tetrahydro-furan-2-carboxylic acid ethylamide