Using CCOC(=O)c1sc(N)nc1C(F)(F)F, CC(C)(C)OC(=O)OC(=O)OC(C)(C)C to produce CCOC(=O)c1sc(NOC(=O)OC(C)(C)C)nc1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.