β-5-(2,2-dibromovinyl)-2'-deoxy-3',5'-di-o-(p-chlorobenzoyl)uridine
α-5-(2,2-dibromovinyl)-2'-deoxy-3',5'-di-o-(p-chlorobenzoyl)uridine
1-(3-O-acetyl-5-O-benzoyl-2-deoxy-2-azido-β-D-arabinofuranosyl)-5-dibromovinyluracil
1-(3-O-acetyl-5-O-benzoyl-2-deoxy-2-azido-α-D-arabinofuranosyl)-5-dibromovinyluracil
α-5-(bromoethynyl)-1-<2-'deoxy-3',5'-di-O-(p-chlorobenzoyl)>-uridine