Using CCOC(=O)c1cn2c3ccc(Br)cc3c3cc(OC)cc(c1=O)c32 to produce COc1cc2c(=O)c(C(=O)O)cn3c4ccc(Br)cc4c(c1)c23, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.