5-hydroxy-4-methoxy-7-oxo-7H-furo[3,2-g]chromene-6-carbaldehyde 7H-furo[3,2-g][1]benzopyran-6-carboxaldehyde, 5-hydroxy-4-methoxy-7-oxo- InChI=1/C13H8O6/c1-17-12-6-2-3-18-8(6)4-9-10(12)11(15)7(5-14)13(16)19-9/h2-5,15H,1H