Using CCCCCC(O)c1ccc(N2C(=O)NC(=O)C2CCCc2ccc(C(=O)OC(C)C)s2)cc1 to produce CCCCCC(=O)c1ccc(N2C(=O)NC(=O)C2CCCc2ccc(C(=O)OC(C)C)s2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.