Using COC(=O)CN, C[Si](C)(C)CCOCOc1cc(OCc2ccsc2)ccc1C(=O)O to produce COC(=O)CNC(=O)c1ccc(OCc2ccsc2)cc1OCOCC[Si](C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.