InChI=1S/C14H22O8/c1-7(15)5-3-4-6-8(2)21-14-11(18)9(16)10(17)12(22-14)13(19)20/h3,5,8-12,14,16-18H,4,6H2,1-2H3,(H,19,20)/b5-3+