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