InChI=1S/C18H16O11/c1-25-12-6-2-3-8(19)27-14(6)16(13-7(12)4-5-26-13)29-18-11(22)9(20)10(21)15(28-18)17(23)24/h2-5,9-11,15,18,20-22H,1H3,(H,23,24)