Using COC(=O)CCC(CC(C)N(C)C)(c1ccccc1)c1ccccc1 to produce CC(CC(CCC(=O)O)(c1ccccc1)c1ccccc1)N(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.