Using c1c[nH]nn1, O=C(Nc1ccn(Cc2ccc(CBr)cc2C(F)(F)F)n1)c1c(F)cccc1F to produce O=C(Nc1ccn(Cc2ccc(Cn3nccn3)cc2C(F)(F)F)n1)c1c(F)cccc1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.