Using O=C(Cl)Cl, Nc1cccc(-c2nc3ccccc3c(=O)o2)c1 to produce O=C=Nc1cccc(-c2nc3ccccc3c(=O)o2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.