Using C[Mg+], C[C@H](O[Si](C)(C)C(C)(C)C)[C@@]1(NC(=O)N(C)C)C(=O)[C@]2(CO[Si](c3ccccc3)(c3ccccc3)C(C)(C)C)O[C@@H]2[C@@H]1NC(=O)OCc1ccccc1 to produce C[C@H](O[Si](C)(C)C(C)(C)C)[C@]1(NC(=O)N(C)C)[C@@H](NC(=O)OCc2ccccc2)[C@H]2O[C@@]2(CO[Si](c2ccccc2)(c2ccccc2)C(C)(C)C)[C@]1(C)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.