InChI=1S/C18H18O11/c1-6-3-11(20)27-9-4-8(26-7(2)19)5-10(12(6)9)28-18-15(23)13(21)14(22)16(29-18)17(24)25/h3-5,13-16,18,21-23H,1-2H3,(H,24,25)