Using COC(=O)/C=C/c1ccc(-c2nc3c(C)nn(C4CCCCC4)c3c(=O)[nH]2)c(OC)c1 to produce COC(=O)CCc1ccc(-c2nc3c(C)nn(C4CCCCC4)c3c(=O)[nH]2)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.