InChI=1S/C19H16O6/c1-22-17-7-11(2-5-18(20)21)6-13-9-15(25-19(13)17)12-3-4-14-16(8-12)24-10-23-14/h3-4,6-9H,2,5,10H2,1H3,(H,20,21)