InChI=1S/C18H20O10/c1-7(19)5-6-9-8-3-2-4-10(11(8)17(25)26-9)27-18-14(22)12(20)13(21)15(28-18)16(23)24/h2-4,6-7,12-15,18-22H,5H2,1H3,(H,23,24)/b9-6+