InChI=1S/C15H22O9/c1-2-3-4-5-6-7-11(22-7)14(21)24-15-10(18)8(16)9(17)12(23-15)13(19)20/h3-4,7-12,15-18H,2,5-6H2,1H3,(H,19,20)/b4-3-