3,4-dihydrocoumarin1,2-benzodihydropyrone2-chromanone2-hydroxydihydrocinnamic acid lactone3,4-Dihydrocoumarin3,4-dihydro-2H-chromen-2-one3,4-dihydrocoumarinDihydrocoumarinbenzodihydropyronechroman-2-onehydrocoumarinmelilotic acid lactonemelilotic lactonemelilotinmelilotolo-hydroxydihydrocinnamic acid lactoneo-hydroxyhydrocinnamic acid delta-lactoneoxochroman