InChI=1S/C13H20O11/c1-4(2-3-5(14)15)9(11(19)20)23-13-8(18)6(16)7(17)10(24-13)12(21)22/h4,6-10,13,16-18H,2-3H2,1H3,(H,14,15)(H,19,20)(H,21,22)