acetic acid (2R,3R,4S,5R)-4-acetoxy-2-acetoxymethyl-5-(2-nitro-6-phenethylamino-purin-9-yl)-tetrahydro-furan-3-yl ester 、
3-(4-氯苄基)氮杂环丁烷 生成 Acetic acid (2R,3R,4S,5R)-3,4-diacetoxy-5-{2-[3-(4-chloro-benzyl)-azetidin-1-yl]-6-phenethylamino-purin-9-yl}-tetrahydro-furan-2-ylmethyl ester