Using O=C(NC1CCC2(CC1CS(=O)(=O)c1ccc(Br)cc1)OCCO2)OCc1ccccc1, C[Sn](C)(C)C to produce Cc1ccc(S(=O)(=O)CC2CC3(CCC2NC(=O)OCc2ccccc2)OCCO3)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.