Benzyl 5-O-(aminocarbonyl)-2-(tert-butoxycarbonyl)amino-2-deoxy-3,4-O-isopropylidene-L-xylonate

5-hydroxymethyl-1-(methyl 2',3'-di-O-acetyl-5'-carbobenzyloxyamino-5'-deoxy-β-D-allofuranosyluronate)uracil

5-氨基-1,5-二脱氧-1-(1,2,3,4-四氢-5-羟基甲基-2,4-二氧代嘧啶-1-基)-beta-D-别呋喃糖醛酸

(S)-tert-Butoxycarbonylamino-((4S,5S)-5-carbamoyloxymethyl-2,2-dimethyl-[1,3]dioxolan-4-yl)-acetic acid 2,5-dioxo-pyrrolidin-1-yl ester