InChI=1S/C19H20O10/c1-8-9(5-6-26-2)7-10-3-4-11(20)27-16(10)15(8)28-19-14(23)12(21)13(22)17(29-19)18(24)25/h3-7,12-14,17,19,21-23H,1-2H3,(H,24,25)/b6-5+