Synthesis of a series of 8-(substituted-phenyl)xanthines and a study on the effects of substitution pattern of phenyl substituents on affinity for adenosine A1 and A2A receptors - Bansal, R; Kumar, G; Gandhi, D; Young, LC; Harvey, AL (Eur J Med Chem., 2009)
doi:10.1016/j.ejmech. 2008.10.017