(T-4)-Triphenyl(P,P,P-triphenylphosphine imidato-κN)-phosphorus Diphosphate is an intermediate used in the synthesis of Ganciclovir Triphosphate Triethylamine Salt (G235030), which is an inhibitor of hepatitis B virus DNA polymerase and has shown potent antiviral activity against herpes viruses and hepadnaviruses.