Using O=C(O)c1cc2ccccc2s1, NC1(C(=O)OCc2ccccc2)CCCCC1 to produce O=C(NC1(C(=O)OCc2ccccc2)CCCCC1)c1cc2ccccc2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.