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