Using O=C1Cc2ccccc2N1, O=C1OC(c2ccccc2)c2c(Br)cncc21 to produce O=C1Nc2ccccc2C1=C1OC(c2ccccc2)c2c(Br)cncc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.