Platycodin D3 is a triterpenoid saponin that can be found in Platycodon grandiflorum. Platycodin D3 exhibits multiple activities including anti-inflammation, regulation of airway mucus secretion, improvement of asthmatic airway inflammation and remodeling, and inhibition of hepatitis C virus (HCV) replication. The IC50 value of Platycodin D3 against HCV NS5B RNA-dependent RNA polymerase is 8 µg/mL. Platycodin D3 can be used in studies related to asthma, hepatitis C virus infection and inflammatory diseases[1][2][3][4].