InChI=1S/C18H20O10/c1-26-9-4-8-2-7(6-19)3-10(20)12(8)11(5-9)27-18-15(23)13(21)14(22)16(28-18)17(24)25/h2-5,13-16,18-23H,6H2,1H3,(H,24,25)