Medchemexpress, HY-111802 100mg 3,4'-Dihydroxyflavone CAS:14919-49-4 3,4'-Dihydroxyflavone (3,4'-DHF) is an oral active flavonoid with antiviral activity against Influenza A virus [1] . Purity:>98% Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.