Using Brc1cccc2c1CN(Cc1ccccc1)C2, C=C[Sn](CCCC)(CCCC)CCCC to produce C=Cc1cccc2c1CN(Cc1ccccc1)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.