Using O=C([O-])[O-], CCOC(=O)COc1cc(O)c2c(c1)NC1(CCCCC1)CC2=O to produce COc1cc(OCC(=O)O)cc2c1C(=O)CC1(CCCCC1)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.