Using C[Si](C)(C)CCOCCl, CSc1nc(Cl)c2cn[nH]c2n1 to produce CSc1nc(Cl)c2cnn(COCC[Si](C)(C)C)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.