Using O=C(COc1ccccc1-c1c[nH]cn1)c1cccc(Br)c1 to produce OC(COc1ccccc1-c1c[nH]cn1)c1cccc(Br)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.