Using O=Cc1ccccc1, NCCOc1ccc(CCCCNC(=O)OCc2ccccc2)cc1 to produce O=C(NCCCCc1ccc(OCCNCc2ccccc2)cc1)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.