Using O=c1n(Cc2nc3nc(Cl)ccc3n2CCCC(F)(F)F)c2cnccc2n1C1CC1 to produce O=c1n(Cc2nc3ncccc3n2CCCC(F)(F)F)c2cnccc2n1C1CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.