Using CCOC(=O)COCC(NC(=O)OC(C)(C)C)(c1cccc(Br)c1)C(F)(F)F to produce CCOC(=O)COCC(N)(c1cccc(Br)c1)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.