6-氯嘌呤 、
Acetic acid (S)-4-(tert-butyl-dimethyl-silanyloxymethyl)-4-fluoro-tetrahydro-furan-2-yl ester 生成 9-[(2R,4S)-4-(tert-Butyl-dimethyl-silanyloxymethyl)-4-fluoro-tetrahydro-furan-2-yl]-6-chloro-9H-purine 、 9-[(2S,4S)-4-(tert-Butyl-dimethyl-silanyloxymethyl)-4-fluoro-tetrahydro-furan-2-yl]-6-chloro-9H-purine