Mycophenolic acid-d3 (Mycophenolate-d3) is deuterium labeled Mycophenolic acid (HY-B0421). Mycophenolic acid is a potent uncompetitive inosine monophosphate dehydrogenase (IMPDH) inhibitor with an EC50 of 0.24 µM. Mycophenolic acid demonstrates antiviral effects against a wide range of RNA viruses including influenza. Mycophenolic acid is an immunosuppressive agent. Antiangiogenic and antitumor effects.