Using C[Si](C)(C)CCOCn1cnc2c(Cl)nc(Cl)nc21, C=CC(=O)Nc1cccc(O)c1 to produce C=CC(=O)Nc1cccc(Oc2nc(Cl)nc3c2ncn3COCC[Si](C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.