Using Cc1ccc(S(=O)(=O)O[C@@H](C)C(=O)O)cc1, C=C(C)C to produce Cc1ccc(S(=O)(=O)O[C@@H](C)C(=O)OC(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.