Using CCCC[Sn](CCCC)(CCCC)c1ccnc(SC)n1, Brc1ccc2c(c1)c(I)nn2C1CCCCO1 to produce CSc1nccc(-c2nn(C3CCCCO3)c3ccc(Br)cc23)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.