Using O=Cc1cncn1Cc1ccccc1, BrCCC(c1ccccc1)c1ccccc1 to produce OC(CCC(c1ccccc1)c1ccccc1)c1cncn1Cc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.