Using CO/N=C/C1=NN(C(=O)OC(C)(C)C)C(=O)N(NC(=O)OC(C)(C)C)C1 to produce CO/N=C/C1=NNC(=O)N(N)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.