Clerodendrin (Apigenin-7-O-glucuronopyranosyl(1-2)-glucuronopyranoside) is a new neodentate diterpenoid isolated from the leaves of Clerodendron trichotomm, a radish sawfly Athalia Clerodendrin is an interleukin-4 (IL-4) inhibitor and β-hexosaminidase (Hex) inhibitor.

Inhalation challenge with capsaicin and rapid intravenous injection of Lobelin and alinamin indicated that peripheral c-fiber receptors were involved in the induction of coughing.