Using O=[Cr](=O)([O-])Cl, O=C1NCC=NN1c1cc(Cl)c(Cc2ccc(Cl)cc2)c(Cl)c1 to produce O=c1cnn(-c2cc(Cl)c(Cc3ccc(Cl)cc3)c(Cl)c2)c(=O)[nH]1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.