Using O=C(Cl)OCCCl, Nc1nc(-c2nc(Cc3ccccc3F)n3ncccc23)nc(N)c1N to produce Nc1nc(-c2nc(Cc3ccccc3F)n3ncccc23)nc(N)c1NC(=O)OCCCl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.