Using CCC(O)c1cnc2c(ccn2COCC[Si](C)(C)C)c1Cl to produce CCC(=O)c1cnc2c(ccn2COCC[Si](C)(C)C)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.