Using O=Cc1cnn2c(NC3CC3)cc(Cl)nc12, [N-]=[N+]=[N-] to produce [N-]=[N+]=Nc1cc(NC2CC2)n2ncc(C=O)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.