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