Using CN(CC(=O)c1ccc(OCC(=O)OCc2ccccc2)cc1)C(=O)OC(C)(C)C to produce CNCC(=O)c1ccc(OCC(=O)OCc2ccccc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.