InChI=1S/C17H22O9/c1-8(10(15(21)22)9-5-3-2-4-6-9)7-25-17-13(20)11(18)12(19)14(26-17)16(23)24/h2-6,8,10-14,17-20H,7H2,1H3,(H,21,22)(H,23,24)