Using CCCCNc1nc(NCCCC)nc(N2C(C)(C)CC(OC(=O)c3ccccc3)CC2(C)C)n1 to produce CCCCNc1nc(NCCCC)nc(N2C(C)(C)CC(O)CC2(C)C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.