Fumagillin is a meroterpenoid formed by the condensation of the hydroxy group of fumagillol with the carboxylic acid group of (all-E)-deca-2,4,6,8-tetraenedioic acid. Originally isolated from *Aspergillus fumigatus*, it is used to control Nosema infection in honey bees. It functions as an angiogenesis inhibitor, antibacterial drug, antiprotozoal drug, methionine aminopeptidase 2 inhibitor, antimicrobial agent, and fungal metabolite. It is classified as an organooxygen heterocyclic antibiotic, meroterpenoid, carboxylic ester, dicarboxylic acid monoester, antibiotic antifungal drug, and spiro-epoxide. It is functionally related to fumagillol and (all-E)-deca-2,4,6,8-tetraenedioic acid.
