Using CSc1ccc(CC2c3ccccc3C(=O)C2C)cc1, COC(=O)CBr to produce COC(=O)CC1C(C)=C(Cc2ccc(SC)cc2)c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.