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