InChI=1S/C17H22O9/c1-24-11-4-2-9(3-5-11)6-10(7-18)8-25-17-14(21)12(19)13(20)15(26-17)16(22)23/h2-5,7,10,12-15,17,19-21H,6,8H2,1H3,(H,22,23)