Using COC(=O)c1ccc(OCc2ccsc2)cc1O, C[Si](C)(C)CCOCCl to produce COC(=O)c1ccc(OCc2ccsc2)cc1OCOCC[Si](C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.