InChI=1S/C19H17FN2O9S/c1-2-6-21-12-8-13(11(20)7-15(12)30-9-16(23)24)22-18(25)10-4-3-5-14(17(10)19(22)26)31-32(27,28)29/h1,7-8,14,21H,3-6,9H2,(H,23,24)(H,27,28,29)