Using COc1ccc(C(=O)Nc2cccc3cc(Br)cnc23)c(OC)c1OC to produce O=C(Nc1cccc2cc(Br)cnc12)c1ccc(O)c(O)c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.