InChI=1S/C18H18O11/c19-9-6-11-10(26-7-27-11)5-8(9)3-1-2-4-12(20)28-18-15(23)13(21)14(22)16(29-18)17(24)25/h1-6,13-16,18-19,21-23H,7H2,(H,24,25)/b3-1-,4-2+