Using COCCl, CC1COC(=O)N1c1cc(-c2ccnc(Nc3cccc(Cl)c3)n2)ccn1 to produce COCN(c1cccc(Cl)c1)c1nccc(-c2ccnc(N3C(=O)OCC3C)c2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.