Using COc1ccc(CN2C(=O)c3cccc(Br)c3C23C=CN(C(=O)OC(C)(C)C)CC3)cc1 to produce O=C1NC2(C=CNCC2)c2c(Br)cccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.