InChI=1S/C18H20O11/c19-12-13(20)15(17(24)25)29-18(14(12)21)28-10(16(22)23)3-1-2-8-4-5-9-11(6-8)27-7-26-9/h1-2,4-6,10,12-15,18-21H,3,7H2,(H,22,23)(H,24,25)/b2-1-