Using CCOC(=O)CBr, O=Cc1[nH]c2c(c1CCCN1CCNCC1)CCCC2 to produce CCOC(=O)CN1CCN(CCCc2c(C=O)[nH]c3c2CCCC3)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.