InChI=1S/C18H20O11/c19-12(20)4-2-1-3-8-5-10-11(27-7-26-10)6-9(8)28-18-15(23)13(21)14(22)16(29-18)17(24)25/h1,3,5-6,13-16,18,21-23H,2,4,7H2,(H,19,20)(H,24,25)/b3-1-