Using C1COCCN1, CC(=O)Oc1cc2cc(C(=O)CBr)oc2c(C)c1C to produce CC(=O)Oc1cc2cc(C(=O)CN3CCOCC3)oc2c(C)c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.