4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 2,3,4a,8a-TETRAHYDRO-7-HYDROXY-4-OXO-, ACETAT 4H-1-Benzopyran-2-carboxylic acid, 2,3,4a,8a-tetrahydro-7-hydroxy-4-oxo-, acetate