Using COC(=O)CCCCCCCCCCCN1CCNCC1CCCCCCCCCCCC(=O)O to produce O=C(O)CCCCCCCCCCCC1CNCCN1CCCCCCCCCCCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.