InChI=1S/C17H26O8/c1-2-3-8-11(9-6-4-5-7-10-18)24-17-14(21)12(19)13(20)15(25-17)16(22)23/h5-7,9-15,17,19-21H,2-4,8H2,1H3,(H,22,23)/b7-5+,9-6-