InChI=1S/C14H20O11/c15-7(16)5-3-1-2-4-6(12(20)21)24-14-10(19)8(17)9(18)11(25-14)13(22)23/h3,5-6,8-11,14,17-19H,1-2,4H2,(H,15,16)(H,20,21)(H,22,23)/b5-3+