Using CCOC(=O)NN, CCC(O)C(=O)c1ccc2nc(-c3ccccc3)oc2c1 to produce CCC1OC(=O)NN=C1c1ccc2nc(-c3ccccc3)oc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.