Using O=C(O)C1CCCCC1, COc1cnc(N2CCOCC2)c2sc(N)nc12 to produce COc1cnc(N2CCOCC2)c2sc(NC(=O)C3CCCCC3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.