Angustifolionol has been shown by its general properties and by alkaline degradation to acetone and 2,6-dihydroxy-4-methoxy-3,6-dimethylbenzoic acid (I1 ; R"=W) to be 5-hydroxy-7-methoxy-2,6,8-trimethylbenzochromone (I ; R,Rf=CK,). Its possible biogenetio relations are discussed.