Using CC(C)(C)OC(=O)N1Cc2cnc(S(C)(=O)=O)nc2C1, OCC(F)(F)F to produce FC(F)(F)COc1ncc2c(n1)CNC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.