Using CN1CCN(c2cc(CC(=O)OC(C)(C)C)ccn2)CC1, O=C(c1ncc[nH]1)c1ncc[nH]1 to produce CN1CCN(c2cc(CC(N)=O)ccn2)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.