(5R,6R)-5-Bromo-6-ethoxy-5,6-dihydro-2',3'-O-(1-methylethylidene)uridine 125310-70-5 5-Bromo-6-ethoxy-5,6-dihydro-2',3'-isopropylidine-beta-ribofuranosyluracil BEIRU Uridine, 5-bromo-6-ethoxy-5,6-dihydro-2',3'-O-(1-methylethylidene)-, (5R,6R)-