Using C=C(OCC)[Sn](CCCC)(CCCC)CCCC, CC(=O)Oc1ccc2c(ccn2S(=O)(=O)c2ccccc2)c1Br to produce CC(=O)c1c(O)ccc2c1ccn2S(=O)(=O)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.