Using COCCCl, CCOC(=O)c1ccc([N+](=O)[O-])c(O)c1Br to produce CCOC(=O)c1ccc([N+](=O)[O-])c(OCCOC)c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.