Brequinar is a potent inhibitor of dihydroorotate dehydrogenase with potent activities against a broad spectrum of viruses.

Sudan I is an organic compound, typically classified as an azo dye.

FLAG peptide is an eight amino acids peptide (Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys) with an enterokinase-cleavage site used for the purification of recombinant proteins.