1 660 [[(2~{R},3~{S},4~{R},5~{R})-5-[2,4-bis(oxidanylidene)pyrimidin-1-yl]-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]oxy-[[(2~{S},3~{R},4~{S},5~{S},6~{R})-6-(hydroxymethyl)-3,4,5-tris(oxidanyl)oxan-2-yl]methyl]phosphinic acid 1.000 2 URM (((2s,3r,4s,5r,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2h-pyran-2-yl)methyl)phosphonic (((2r,3s,4r,5r)-5-(2,4-dioxo-3,4-dihydropyrimidin-1(2h)-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl phosphoric) anhydride 1.000 3 UDM Uridine-diphosphate-methylene-N-acetyl-glucosamine 0.875 4 UDN Uridine-diphosphate-methylene-N-acetyl-galactosamine 0.875