Using O=Cc1cccc(-c2ccc3nc(-c4ccc(Cl)cc4)cn3c2)c1F to produce OCc1cccc(-c2ccc3nc(-c4ccc(Cl)cc4)cn3c2)c1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.