Using COC(=O)CC1CN(C(=O)OC(C)(C)C)CCN1c1cc(C)nc2ccccc12 to produce COC(=O)CC1CNCCN1c1cc(C)nc2ccccc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.