InChI=1S/C17H22O9/c1-8(18)3-4-9-5-10(24-2)7-11(6-9)25-17-14(21)12(19)13(20)15(26-17)16(22)23/h5-7,12-15,17,19-21H,3-4H2,1-2H3,(H,22,23)