Using C#C[Si](C)(C)C, CN(Cc1cccc(Br)c1)C(=O)OC(C)(C)C to produce CN(Cc1cccc(C#C[Si](C)(C)C)c1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.