Antiviral agent 58 (Compound J1) is an orally active antiviral agent with broad-spectrum antiviral activity against enveloped viruses, including influenza A virus (IAV), respiratory syncytial virus (RSV), severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), human coronavirus OC43 (HCoV-OC43), herpes simplex virus type 1 (HSV-1), and HSV-2[1].