Using CCOC(=O)c1c(C)c2cccnc2n1C(=O)OC(C)(C)C to produce CCOC(=O)C1C(C)c2cccnc2N1C(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.