Using CCOC(=O)CCc1ccc(-c2cc(NCC(=O)OC(C)(C)C)ccn2)cc1 to produce CCOC(=O)CCc1ccc(-c2cc(NC)ccn2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.