Using CCOC(=O)c1cnc2cc(C3=CCN(C(=O)OC(C)(C)C)CC3)ccn12 to produce CCOC(=O)c1cnc2cc(C3CCN(C(=O)OC(C)(C)C)CC3)ccn12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.