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