SEARCH Articles Figures Tables Antiviral activities nucleoside phosphonates Cyclic nucleoside phosphonates Ethyl phosphonate nucleosides with Nucleoside 3 -H-phosphonates Nucleoside H-phosphonate Nucleoside Phosphates and Phosphonates Nucleoside phosphonates Nucleoside phosphonates acyclic Phosphates, Phosphonates, Nucleosides, and Nucleotides