sorivudine [ 1-beta-D-arabinofuranosyl-5-(2-bromovinyl)uracil,1-beta-D-arabinofuranosyl-E-5-(2-bromovinyl)uracil,5-(2-bromovinyl)-1-beta-D-arabinofuranosyluracil,BV-ara-U,BV-araU,brovavir ] RN given refers to (E)-isomer; RN for cpd without isomeric designation not available 8/90