Using CCCCC[Mg]Br, CCCCCC(=O)/C=C/[C@H]1CCC(=O)N1CCSCCCC(=O)OC to produce CCCCCC(O)(/C=C/[C@H]1CCC(=O)N1CCSCCCC(=O)O)CCCCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.