InChI=1S/C17H22O9/c1-3-4-8-5-9-15(24-7-23-9)16(14(8)22-2)26-17-13(21)12(20)11(19)10(6-18)25-17/h3,5,10-13,17-21H,1,4,6-7H2,2H3