(2R,3R,4S,5S)-3-<N-(tert-butoxycarbonyl)amino>-6-<(tert-butyldimethylsilyl)oxy>-4,5-(isopropylidenedioxy)-1,2-hexanediol

(4S,5S)-4-[(S)-(tert-Butoxycarbonylamino)methoxycarbonylmethyl]-5-(tert-butyldimethylsilyloxymethyl)-2,2-dimethyl-1,3-dioxolane

methyl 2-N-[(tert-butoxycarbonyl)amino]-2-deoxy-3,4-O-isopropylidene-L-xylonate

(S)-[(S)-2-tert-Butoxycarbonylamino-2-((4S,5S)-5-carbamoyloxymethyl-2,2-dimethyl-[1,3]dioxolan-4-yl)-acetylamino]-[(2R,3R,4R,5R)-3,4-diacetoxy-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-yl]-acetic acid methyl ester

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