Alpha benzopyrone

oxygen containing heterocyclic compound, obtainable naturally from several plants, or produced synthetically from an amino acid of phenylalanine; it is used for the preparation of drugs especially anticoagulants such as bishydroxycoumarin (dicoumarol) and warfarin (coumadin); coumarin glycosides such as dicoumarol and warfarin, are widely used as rodenticides.