Using C=C[Mg]Br, CON(C)C(=O)C(CC1CCOCC1)n1ncc2c(S(=O)(=O)C3CC3)cccc21 to produce C=CC(=O)C(CC1CCOCC1)n1ncc2c(S(=O)(=O)C3CC3)cccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.