has role has role coumarins coumarin Coumarine Rattex chebi_ontology A chromenone having the keto group located at the 2-position. 2H-benzo[b]pyran-2-one o-hydroxycinnamic acid delta-lactone 2-Propenoic acid, 3-(2-hydroxyphenyl)-, d-lactone Coumarinic anhydride cis-o-Coumarinic acid lactone 2-Propenoic acid, 3-(2-hydroxyphenyl)-, delta-lactone coumarin CHEBI:3906 Tonka bean camphor CHEBI:101256 Benzo-alpha-pyrone 1,2-Benzopyrone Cumarin Benzo-a-pyrone CHEBI:28794 2H-1-Benzopyran-2-one CHEBI:41552 CHEBI:23402 5,6-Benzo-2-pyrone o-Hydroxycinnamic acid lactone fluorescent dye plant metabolite human metabolite