Using O=C(c1ccc(I)cc1)N1Cc2cccn2Cc2ccccc21, CCCC[Sn](CCCC)(CCCC)c1cccs1 to produce O=C(c1ccc(-c2cccs2)cc1)N1Cc2cccn2Cc2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.