Using Cc1c(-c2nc(-c3c(F)cccc3Cl)nn2C)sc(Br)c1Br, [Li]CCCC to produce Cc1sc(-c2nc(-c3c(F)cccc3Cl)nn2C)c(C)c1Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.