2-nonulopyranosonic acid, 5-(acetylamino)-3,5-dideoxy-, methyl ester, 4,7,8,9-tetraacetate 2-(2-propenylcarbamate) InChI=1/C24H34N2O14/c1-8-9-25-23(33)40-24(22(32)34-7)10-17(36-14(4)29)19(26-12(2)27)21(39-24)20(38-16(6)31)18(37-15(5)30)11-35-13(3)28/h8,17-21H,1,9-11H2,2-7H3,(H,25,33)(H,26,27 methyl 4,7,8,9-tetra-O-acetyl-5-(acetylamino)-2-O-[(allylamino)carbonyl]-3,5-dideoxynon-2-ulopyranosonate