Using CCOC(=O)Nc1nn(C(=O)OCC)c2c1CN(C(=O)OC(C)(C)C)C2(C)C to produce CCOC(=O)Nc1nn(C(=O)OCC)c2c1CNC2(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.