Using C[Sn](C)(C)C, CCOC(=O)CNC(=O)c1c(O)c2ccc(Br)cc2oc1=O to produce CCOC(=O)CNC(=O)c1c(O)c2ccc(C)cc2oc1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.