InChI=1S/C14H22O8/c1-3-4-8(6-5-7(2)15)21-14-11(18)9(16)10(17)12(22-14)13(19)20/h5-6,8-12,14,16-18H,3-4H2,1-2H3,(H,19,20)/b6-5+