2,2'-Anhydro-1-(beta-arabinofuranosyl)orotic acid 33886-20-3 6H-Furo(2',3'-4,5)oxazolo(3,2-a)pyrimidine-8-carboxylic acid, 2,3,3a,9a-tetrahydro-3-hydroxy-2-(hydroxymethyl)-6-oxo-, (2R-(2alpha,3beta,3abeta,9abeta))- Ara-orotic acid