InChI=1S/C18H15FN2O4S/c1-2-12-7-8-13(25-12)9-14-16(22)21-18(26-14)20-15(17(23)24)10-3-5-11(19)6-4-10/h3-9,15H,2H2,1H3,(H,23,24)(H,20,21,22)/b14-9-/t15-/m0/s1