Using COc1ccc(-c2cc(C(N)=O)c3[nH]c4c(c3c2)CC(C(=O)N2CCOCC2)CC4)cc1 to produce COc1ccc(-c2cc(C(N)=O)c3[nH]c4ccc(C(=O)N5CCOCC5)cc4c3c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.