InChI=1S/C15H18O9/c1-15(14(21)22,7-5-3-2-4-6-7)24-13-10(18)8(16)9(17)11(23-13)12(19)20/h2-6,8-11,13,16-18H,1H3,(H,19,20)(H,21,22)