InChI=1S/C17H22O9/c18-10-7-5-9(6-8-10)3-1-2-4-11(19)25-17-14(22)12(20)13(21)15(26-17)16(23)24/h5-8,12-15,17-18,20-22H,1-4H2,(H,23,24)