article carbon nuclear magnetic resonance proton nuclear magnetic resonance 6 unclassified drug chemical structure 3 heterocyclic compound 3 synthesis 3 antiviral activity 2 oxadiazole derivative 2 1,2 o isopropylidene alpha dextro xylopentadialdo 1,4 furanose(2 bromobenzoyl)hydrazone 1 1,2 o isopropylidene alpha dextro xylopentadialdo 1,4 furanose(2 chlorobenzoyl)hydrazone 1 1,2 o isopropylidene alpha dextro xylopentadialdo 1,4 furanose(3 bromobenzoyl)hydrazone 1 1,2 o isopropylidene alpha dextro xylopentadialdo 1,4 furanose(3 chlorobenzoyl)hydrazone 1 1,2 o isopropylidene alpha dextro xylopentadialdo 1,4 furanose(4 bromobenzoyl)hydrazone 1 1,2 o isopropylidene alpha dextro xylopentadialdo 1,4 furanose(4 chlorobenzoyl)hydrazone 1 1,2,4 triazolyl 3 thione 1 1,2,4-Triazolyl-3-thione 1 1,2:3:4 di o isopropylidene alpha dextro galacto 1,6 hexadialdo 1,5 pyranose derivative 1 1,3,3 trimethyl 2 norcamphanone 1 1,3,4 oxadiazole derivative 1 1,3,4-Oxadiazole 1 2 (1,2 o isopropylidene alpha dextro xylo tetrafuranos 4 yl) 5 (2 bromophenyl) 1,3,4 oxadiazole 1 2 (1,2 o isopropylidene alpha dextro xylo tetrafuranos 4 yl) 5 (2 chlorophenyl) 1,3,4 oxadiazole 1 2 (1,2 o isopropylidene alpha dextro xylo tetrafuranos 4 yl) 5 (3 bromophenyl) 1,3,4 oxadiazole 1 2 (1,2 o isopropylidene alpha dextro xylo tetrafuranos 4 yl) 5 (3 chlorophenyl) 1,3,4 oxadiazole 1 2 (1,2 o isopropylidene alpha dextro xylo tetrafuranos 4 yl) 5 (4 bromophenyl) 1,3,4 oxadiazole 1 2 (1,2 o isopropylidene alpha dextro xylo tetrafuranos 4 yl) 5 (4 chlorophenyl) 1,3,4 oxadiazole 1 2 (4 chlorophenyl) 5 [1',2',3',5' penta o benzoyl d galactopentitol 1 yl] 1,3,4 oxadiazole 1 2 amino 5 [5' (1',2':3',4' di o isopropylidene beta levo arabinopyranosyl)] 1,3,4 thiadiazole 1 2 amino 5 [5' (alpha levo arabinopyranosyl)] 1,3,4 thiadiazole 1