1H-2-benzopyran-4-carboxaldehyde, 3-methyl-1-oxo- 3-methyl-1-oxo-1H-isochromene-4-carbaldehyde InChI=1/C11H8O3/c1-7-10(6-12)8-4-2-3-5-9(8)11(13)14-7/h2-6H,1H