InChI=1S/C20H19F3O4/c1-2-3-6-11-26-19(24)13-7-4-5-8-14(13)20(25)27-12-15-16(21)9-10-17(22)18(15)23/h4-5,7-10H,2-3,6,11-12H2,1H3