Using NC(=O)c1ccccc1N1CCNCC1, CC(C)(C)OC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N1CCN(c2ccccc2C(N)=O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.