Using FCCBr, O=C1NCCc2cccc(N(Cc3ccccc3)Cc3ccccc3)c21 to produce O=C1c2c(cccc2N(Cc2ccccc2)Cc2ccccc2)CCN1CCF, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.