Using C=C(OCC)[Sn](CCCC)(CCCC)CCCC, Clc1cnc2cc(Br)ccc2n1 to produce C=C(OCC)c1cnc2cc(Br)ccc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.