Using O=C1NC(=O)c2ccccc21, C[Si](C)(C)N(CCCBr)[Si](C)(C)C to produce C[Si](C)(C)N(CCCN1C(=O)c2ccccc2C1=O)[Si](C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.