The pyridinone ring is one of the most well-known systems among the naturally occurring heterocycles. Many members of this class of heterocycles have antibacterial [1], antifungal [2], cardiotonic [3], antineoplastic [4], antiinflammatory and analgesic [5], and other significant bioactivities [6]. Therefore, pyridinone derivatives, especially bispyridinone derivatives, which contain two skeletons of pyridinone in one molecular structure, are of ...
