2H-1-benzopyran-2-one, 3-acetyl-4-hydroxy- 3-acetyl-4-hydroxy-2H-chromen-2-one InChI=1/C11H8O4/c1-6(12)9-10(13)7-4-2-3-5-8(7)15-11(9)14/h2-5,13H,1H