HAV 3C proteinase-IN-1 is primarily utilized in the field of antiviral research, specifically targeting the Hepatitis A Virus (HAV). Its main application lies in its ability to inhibit the 3C proteinase of HAV, an enzyme crucial for viral replication. By blocking this proteinase, the compound effectively disrupts the virus's lifecycle, preventing it from maturing and spreading. This makes it a valuable tool in the development of antiviral therapies aimed at combating Hepatitis A infections. Researchers use it to study the mechanisms of viral inhibition and to design more effective drugs for treating or preventing the disease.