| Antiviral | EC50 ratio | Phenotype | Strain | Source | Marker | Assay | Reference |
|---|---|---|---|---|---|---|---|
| 8-cyclopentyl-1,3-dipropylxanthine | 0.85 | No resistance | Laboratory strain, Clinical Isolate | Recombinant | Details | Characterization of human cytomegalovirus (HCMV) UL97 mutations found in a valganciclovir/oral ganciclovir prophylactic trial by use of a bacterial artificial chromosome containing the HCMV genome. (Sep 2006) |