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