Using OCCN1CCOCC1, COC(=O)c1cc(Br)nc2c1[nH]c1cc(O)ccc12 to produce COC(=O)c1cc(Br)nc2c1[nH]c1cc(OCCN3CCOCC3)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.