InChI=1S/C16H22O11/c1-7(12(20)21)5-3-4-6-16(2,15(24)25)27-14-10(19)8(17)9(18)11(26-14)13(22)23/h3-5,8-11,14,17-19H,6H2,1-2H3,(H,20,21)(H,22,23)(H,24,25)/b4-3+,7-5+