7-[(2S,3S,4R,5R)-3,4-二羟基-5-(羟甲基)-2-吡咯烷基]-3,5-二氢-4H-吡咯并[3,2-D]嘧啶-4-酮

(1S)-1-(7-N-benzyloxymethyl-9-deaza-6-O-methylhypoxanthin-9-yl)-1,4-dideoxy-1,4-imino-2,3-O-isopropylidene-D-ribitol

(3aR,4R,6S,6aS)-tert-butyl 4-(((tert-butyldimethylsilyl)oxy)methyl)-6-(cyanomethyl)-2,2-dimethyldihydro-3aH-[1,3]dioxolo[4,5-c]pyrrole-5(4H)-carboxylate

(1S)-N-tert-butoxycarbonyl-5-O-tert-butyldimethylsilyl-1-C-(1-cyano-2-hydroxyethenyl)-1,4-dideoxy-1,4-imino-2,3-O-isopropylidene-D-ribitol

N-tert-butoxycarbonyl-7-O-tert-butyldimethylsilyl-2-cyano-1,2,3,6-tetradeoxy-1-N-(ethoxycarbonylmethylamino)-3,6-imino-4,5-O-isopropylidene-D-allo-hept-1-enitol

2-((3aS,4S,6R,6aR)-6-(((tert-butyldimethylsilyl)oxy)methyl)-2,2-dimethyltetrahydro-3aH-[1,3]dioxolo [4,5-c]pyrrol-4-yl)acetonitrile

5-O-[(tert-butyl)dimethylsilyl]-1,4-dideoxy-1,4-imino-2,3-O-isopropylidene-D-ribitol

1-benzyl 2-ethyl 3-amino-4-((3aS,4S,6R,6aR)-5-(tert-butoxycarbonyl)-6-(((tert-butyldimethylsilyl)oxy)methyl)-2,2-dimethyltetrahydro-3aH-[1,3]dioxolo [4,5-c]pyrrol-4-yl)-1H-pyrrole-1,2-dicarboxylate

(3aS,4S,6R,6aR)-tert-butyl 4-(4-amino-5-(ethoxycarbonyl)-1H-pyrrol-3-yl)-6-(((tert-butyldimethylsilyl)oxy)methyl)-2,2-dimethyldihydro-3aH-[1,3]dioxolo[4,5-c]pyrrole-5(4H)-carboxylate

(3aR,4R,6aS)-4-(((tert-butyldimethylsilyl)oxy)methyl)-2,2-dimethyl-4,6a-dihydro-3aH-[1,3]dioxolo[4,5-c]pyrrole

(1S)-N-tert-butoxycarbonyl-5-O-tert-butyldimethylsilyl-1-(9-deazahypoxanthin-9-yl)-1,4-dideoxy-1,4-imino-2,3-O-isopropylidene-D-ribitol