2H-1-benzopyran-2-one, 5-ethyl-4-hydroxy- 5-ethyl-4-hydroxy-2H-chromen-2-one InChI=1/C11H10O3/c1-2-7-4-3-5-9-11(7)8(12)6-10(13)14-9/h3-6,12H,2H2,1H