acetic acid (2R,3R,4R,5R)-4-acetoxy-2-[6-((S)-1-benzyl-2-hydroxy-ethylamino)-2-chloro-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)-tetrahydro-furan-3-yl ester 、
(2R,3R,4S,5S)-2-[6-((S)-1-benzyl-2-hydroxy-ethylamino)-2-chloro-purin-9-yl]-5-(3-ethyl-isoxazol-5-yl)-tetrahydro-furan-3,4-diol 生成 (2R,3R,4S,5R)-2-[6-((s)-1-benzyl-2-hydroxy-ethylamino)-2-chloro-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)-tetrahydro-furan-3,4-diol