InChI=1S/C17H14O11/c18-7-4-9(19)26-14-5(7)1-2-8-6(14)3-10(25-8)27-17-13(22)11(20)12(21)15(28-17)16(23)24/h1-4,11-13,15,17-18,20-22H,(H,23,24)