Using COC(=O)COC1(c2nccs2)CCN(C(=O)OC(C)(C)C)C1 to produce CC(C)(C)OC(=O)N1CCC(OCCO)(c2nccs2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.