InChI=1S/C18H22O10/c1-25-11-5-2-10(3-6-11)4-7-12(19)26-8-9-27-18-15(22)13(20)14(21)16(28-18)17(23)24/h2-7,13-16,18,20-22H,8-9H2,1H3,(H,23,24)/b7-4+