Using NCCc1ccc2c(c1)OCO2, O=C(O)Cc1ccc(Br)cc1 to produce O=C(Cc1ccc(Br)cc1)NCCc1ccc2c(c1)OCO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.