InChI=1S/C17H28O8/c1-11(9-7-5-3-2-4-6-8-10-18)24-17-14(21)12(19)13(20)15(25-17)16(22)23/h2-3,6,8,11-15,17-21H,4-5,7,9-10H2,1H3,(H,22,23)/b3-2-,8-6+