Using CON(C)C(=O)C(CO[Si](C)(C)C(C)(C)C)NC(=O)OC(C)(C)C, CC[Mg+] to produce CCC(=O)C(CO[Si](C)(C)C(C)(C)C)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.