Using COC(=O)CC1NCCc2c(Br)cccc21, COC(=O)CC1c2cccc(Br)c2CCN1C(C)=O to produce O=C1C=C2c3cccc(Br)c3CCN2C(=O)CN1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.