Using CCCCCCCCN1C(=O)N(CCCC)C(=O)C1CCCCCCC(=O)OCC to produce CCCCCCCCN1C(=O)N(CCCC)C(=O)C1CCCCCCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.