Using CC1(C)CCC(=O)c2cc(Br)ccc21, C=C(OCC)[Sn](CCCC)(CCCC)CCCC to produce CC(=O)c1ccc2c(c1)C(=O)CCC2(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.