InChI=1S/C21H34F2O5/c1-3-14(2)13-20(22,23)21(27)11-10-16-15(17(24)12-18(16)28-21)8-6-4-5-7-9-19(25)26/h14-16,18,27H,3-13H2,1-2H3,(H,25,26)/t14-,15+,16+,18+,21+/m0/s1