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