1,2-Dideoxy-beta-D-ribofuranose 1,2-Dideoxyribofuranose 1,2-Drf 1,4-Anhydro-2-deoxy-D-ribitol 91547-59-0 D-erythro-Pentitol, 1,4-anhydro-2-deoxy-, (Z,E,E,E,E)-