Using CCOC(=O)c1c(C)nc2c(O)cc(C)cn12, CS(=O)(=O)OCC1CC(F)(F)C1 to produce CCOC(=O)c1c(C)nc2c(OCC3CC(F)(F)C3)cc(C)cn12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.