Using CCOC(=O)Cn1c(=O)n(C(=O)OC(C)(C)C)c2cccc(C(CC)CC)c21 to produce CCOC(=O)Cn1c(=O)[nH]c2cccc(C(CC)CC)c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.