(1S,2R)-1-((2R,3R,4S)-3-acetamido-4-azido-6-(methoxycarbonyl)-3,4-dihydro-2H-pyran-2-yl)propane-1,2,3-triyl triacetate;Methyl 7,8,9-tri-o-acetyl-N-acetyl-2-deoxy-2,3-didehydro-4a-azido-D-neuraminate;4-Azido-2,4-dideoxy-2,3-didehydro-7-O,8-O,9-O,N-tetraacetyl-alpha-neuraminic acid methyl ester;D-glycero-D-galacto-Non-2-enonic acid, 5-(acetylamino)-2,6-anhydro-4-azido-3,4,5-trideoxy-, methyl ester, 7,8,9-triacetate;Methyl 5-acetamido-7,8,9-O-triacetyl-2,6-anhydro-4-azido-3,4,5-trideoxy-D-glycero-D-galacto-non-2-enonat;METHYL 5-ACETAMIDO-7,8,9-O-TRIACETYL-2,6-ANHYDRO-4-AZIDO-3,4,5-TRIDEOXY-D-GLYCERO-D-GALACTO-NON-2-ENONATE;Methyl7,8,9-tri-O-acetyl-N-acetyl-2-deoxy-2,3-didehydro-4a-azido-D-neuraminate (Zanamivir Intermediates)