Using CC(C)(C)OC(=O)CNC(=O)Nc1ccc(C=NO)cc1, C=CCBr to produce C=CCON=Cc1ccc(NC(=O)NCC(=O)OC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.