Using COc1cnc(Cn2ccnc2-c2cccc(F)n2)c(Cl)n1, CCCC[Sn](CCCC)(CCCC)c1ccccn1 to produce COc1cnc(Cn2ccnc2-c2cccc(F)n2)c(-c2ccccn2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.