Using COc1ccc(OCC2CN(C(C)CO[Si](C)(C)C(C)(C)C)C(=O)O2)cc1 to produce COc1ccc(OCC2CN(C(C)CO)C(=O)O2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.