Using O=C(O)CCCBr, N#CC1(NC(=O)C(CC2CCCCC2)NC(=O)N2CCOCC2)CCNCC1 to produce N#CC1(NC(=O)C(CC2CCCCC2)NC(=O)N2CCOCC2)CCN(CCCC(=O)O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.