1H-Benzimidazole, 5,6-dichloro-1-(2,3-O-(1-methylethylidene)-beta-D-ribofuranosyl)- 2',3'-O-Isopropylidene-5,6-dichloro-1-beta-D-ribofuranosylbenzimidazole 2',3'-O-Isopropylidene-drb 78621-35-9 Benzimidazole, 5,6-dichloro-1-beta-D-ribofuranosyl-, 2',3'-cyclic acetal with acetone