InChI=1S/C16H24O8/c1-2-9-10(23-9)7-5-3-4-6-8-22-16-13(19)11(17)12(18)14(24-16)15(20)21/h3-6,9-14,16-19H,2,7-8H2,1H3,(H,20,21)/b5-3-,6-4+