Using CC(=O)SCC(C(=O)O)C1CCN(C(=O)OCc2ccccc2)CC1, C=C(C)C to produce CC(=O)SCC(C(=O)OC(C)(C)C)C1CCN(C(=O)OCc2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.