Using CCCC[Sn](CCCC)(CCCC)c1ccc(C[C@H](NC(=O)OC(C)(C)C)C(=O)OC)cc1, Cn1cc(Br)cc(Br)c1=O to produce COC(=O)[C@H](Cc1ccc(-c2cc(Br)cn(C)c2=O)cc1)NC(=O)OC(C)(C)C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.