Using CN1CCN(C[C@H](NC(=O)OC(C)(C)C)c2ccc(O[Si](C)(C)C(C)(C)C)cc2)CC1 to produce CN1CCN(C[C@H](NC(=O)OC(C)(C)C)c2ccc(O)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.