Using Cc1ccc2nc(Nc3nc4cc(C(=O)O)ccc4n3C)sc2c1, COCCN to produce COCCNC(=O)c1ccc2c(c1)nc(Nc1nc3ccc(C)cc3s1)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.