Structures of antiviral agents with reported off-site targets for cancer therapy (Efavirenz, Cidofovir, Ganciclovir, Ribavirin, Lopinavir, Ritonavir, Maraviroc, Nelfinavir, Zidovudine, and Indinavir) or detection (Amantadine). Structures have been drawn with ChemDraw 20.0.