Using C=C(OCC)[Sn](CCCC)(CCCC)CCCC, Brc1cnc(-c2ncc(Br)s2)s1 to produce C=C(OCC)c1cnc(-c2ncc(C(=C)OCC)s2)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.