InChI=1S/C16H20O9/c1-22-10-5-7(4-8-6-23-8)2-3-9(10)24-16-13(19)11(17)12(18)14(25-16)15(20)21/h2-3,5,8,11-14,16-19H,4,6H2,1H3,(H,20,21)