InChI=1S/C18H22O8/c1-9(2)12(19)8-5-10-3-6-11(7-4-10)25-18-15(22)13(20)14(21)16(26-18)17(23)24/h3-9,13-16,18,20-22H,1-2H3,(H,23,24)