1,2:3:4 di o isopropylidene alpha dextro galacto 1,6 hexadialdo 1,5 pyranose derivative 2 2 amino 5 [5' (1',2':3',4' di o isopropylidene beta levo arabinopyranosyl)] 1,3,4 thiadiazole 2 2 amino 5 [5' (alpha levo arabinopyranosyl)] 1,3,4 thiadiazole 2 2 amino 5 [5' (beta levo arabinopyranosyl)] 1,3,4 thiadiazole 2 2 methyl 5 [5' (1',2':3',4' di o isopropylidene beta levo arabinopyranosyl)] 1,3,4 oxadiazole 2 2 phenyl 5 [5' (1',2':3',4' di o isopropylidene beta levo arabinopyranosyl)] 1,3,4 oxadiazole 2 2 phenyl 5 [5' (alpha levo arabinofuranosyl)] 1,3,4 oxadiazole 2 2 phenyl 5 [5' (alpha levo arabinopyranosyl)] 1,3,4 oxadiazole 2 phenyl 5 [5' (beta levo arabinofuranosyl)] 1,3,4 oxadiazole 2 2 phenyl 5 [5' (beta levo arabinopyranosyl)] 1,3,4 oxadiazole 2 5 [5' (1',2':3',4' di o isopropylidene beta levo arabinopyranosyl)]tetrazole 2 5 [5' (alpha levo arabinopyranosyl)]tetrazole 2 5 [5' (beta levo arabinopyranosyl)]tetrazole 2 Isocarbonucleosides 2 Isopropylidene deprotection 2 Microwaves 2 antiviral activity 2 article 2 assay 2 carbon nuclear magnetic resonance 2 deprotection reaction 2 functional group 2 heating 2 intermethod comparison 2 isocarbonucleoside derivatives 2 isopropylidene 2 microwave radiation 2 n acetyl alpha dextro galacturonopyranosylhydrazide 2 n acetyl beta dextro galacturonopyranosylhydrazide 2 nucleoside derivative 2