Using C=CC(=O)OC(C)(C)C, CC(C)c1nc(C(=O)N2CCOC3(CCN(CCOc4ccccc4CCO)CC3)C2)cs1 to produce CC(C)c1nc(C(=O)N2CCOC3(CCN(CCOc4ccccc4CCOCCC(=O)OC(C)(C)C)CC3)C2)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.