Using CCOC(=O)C(CCc1ccccc1)NC1CCCCCCN(C(C)C(=O)OCC)C1=O to produce CC(C(=O)O)N1CCCCCCC(NC(CCc2ccccc2)C(=O)O)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.