Panteleon Vassiliki, Kostakis Ioannis K, Marakos Panagiotis, Pouli Nicole, Andreadou Ioanna
Department of Pharmacy, Division of Pharmaceutical Chemistry, University of Athens, Athens, Greece.
Chem Pharm Bull (Tokyo). 2009 May;57(5):446-52. doi: 10.1248/cpb.57.446.
The preparation of some new spiro-substituted 4-hydroxypyranoquinolinones and their corresponding dihydropyrano cis-diols is described. The free radical scavenging activity of the compounds was determined by means of their interaction with the stable free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) and the superoxide anions generated by the enzymic xanthine-xanthine oxidase system. The spiroadamatylpyranoquinolinone analogue proved to be the most efficient free radical scavenger.