Using COc1c(Br)ccc2c1ncn2C1CCCCO1, OB(O)/C=C/c1ccccc1 to produce COc1c(C=Cc2ccccc2)ccc2c1ncn2C1CCCCO1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.