Using COC(=O)CCn1ccc(-c2cc3c(ccc4nnc(C)n43)n2Cc2cccc(Cl)c2)n1 to produce Cc1nnc2ccc3c(cc(-c4ccn(CCC(=O)O)n4)n3Cc3cccc(Cl)c3)n12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.