121563-65-3 5-(2-Iodovinyl)-1-(2'-fluoro-2'-deoxyuridine) 5-(2-Iodovinyl)-1-(2-deoxy-2-fluoro-D-ribofuranosyl)uracil IVFRU Uridine, 2'-deoxy-2'-fluoro-5-(2-iodoethyenyl)-, (E)-