InChI=1S/C17H26O9/c18-11(19)9-7-5-3-1-2-4-6-8-10-25-17-14(22)12(20)13(21)15(26-17)16(23)24/h1,3,7,9,12-15,17,20-22H,2,4-6,8,10H2,(H,18,19)(H,23,24)/b3-1-,9-7+