Using CCCCCC(C(=O)OCC)c1ccc(NC(=O)C=C(C)C)cc1 to produce CCCCCC(C(=O)OCC)c1ccc2c(c1)C(C)(C)CC(=O)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.