Picfeltarraenin IA is an Acetylcholinesterase inhibitor. Picfeltarraenin IA can be extracted from the plant Picria fel-terrae Lour. Picfeltarraenin IA reduces the production of IL-8 and PGE2. Picfeltarraenin IA inhibits COX2 via the NF-kappaB pathway. Picfeltarraenin IA can be used in the research of respiratory system diseases[1][2].