Using C=CCBr, CC(=NO)c1ccc(NC(=O)NCC(=O)OC(C)(C)C)cc1 to produce C=CCON=C(C)c1ccc(NC(=O)NCC(=O)OC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.