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