Using CCCCc1nc2cc(Br)c(CO)nc2n1CC(=O)c1ccccc1, OB(O)OC=Cc1ccccc1 to produce CCCCc1nc2cc(C=Cc3ccccc3)c(CO)nc2n1CC(=O)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.