InChI=1S/C16H22O9/c1-15-6-2-5(3-7(6)15)16(15,4-17)14(23)25-13-10(20)8(18)9(19)11(24-13)12(21)22/h5-11,13,17-20H,2-4H2,1H3,(H,21,22)