InChI=1S/C16H20O8/c1-3-4-8-5-6-9(10(7-8)22-2)23-16-13(19)11(17)12(18)14(24-16)15(20)21/h3,5-7,11-14,16-19H,1,4H2,2H3,(H,20,21)