Using CCOC(=O)c1cc(Cl)c(NC(=O)C(C)(C)C)nc1N, O=C(Cl)CCl to produce CCOC(=O)c1cc(Cl)c(NC(=O)C(C)(C)C)nc1NC(=O)CCl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.