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