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