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