InChI=1S/C16H14O11/c17-9-10(18)12(14(22)23)27-16(11(9)19)26-7-3-1-2-5-6(7)4-8(13(20)21)25-15(5)24/h1-4,9-12,16-19H,(H,20,21)(H,22,23)