Using COS(=O)(=O)OC, C[Si](C)(C)CCOCn1nc(C=Cc2ccccc2)c2ccc(Nc3cccc([N+](=O)[O-])c3)cc21 to produce CN(c1cccc([N+](=O)[O-])c1)c1ccc2c(C=Cc3ccccc3)nn(COCC[Si](C)(C)C)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.