Using O=C(O)c1ccccc1S, O=C(NCCCBr)OCC1c2ccccc2-c2ccccc21 to produce O=C(NCCCSc1ccccc1C(=O)O)OCC1c2ccccc2-c2ccccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.