InChI=1S/C19H18O10/c20-9-6-7-12(11(8-9)18(26)27-10-4-2-1-3-5-10)28-19-15(23)13(21)14(22)16(29-19)17(24)25/h1-8,13-16,19-23H,(H,24,25)