InChI=1S/C18H18F6O6/c1-9(2)10(3)28-14(25)13(30-16(27)18(22,23)24)8-11-4-6-12(7-5-11)29-15(26)17(19,20)21/h4-7,9-10,13H,8H2,1-3H3/t10-,13+/m1/s1