InChI=1S/C16H20O9/c1-4-7-5-8(22-2)13(9(6-7)23-3)24-16-12(19)10(17)11(18)14(25-16)15(20)21/h4-6,10-12,14,16-19H,1H2,2-3H3,(H,20,21)