InChI=1S/C21H10F2O7/c22-13-4-11-17(6-15(13)24)30-18-7-16(25)14(23)5-12(18)19(11)9-2-1-8(20(26)27)3-10(9)21(28)29/h1-7,24H,(H,26,27)(H,28,29)