Abstract
A series of substituted and structural analogues of 7,8-benzoflavone were examined for their ability to inhibit benzo[a]pyrene oxidation by the mixed-function oxidases found in hepatic microsomes prepared from 3-methylcholanthrene- and phenobarbital-induced rats. Of all the benzoflavones tested, only 6-amino-7,8-benzoflavone possessed significant inhibitory activity toward both classes of induced mixed-function oxidases. Parameters which were found to be necessary for maximal inhibitory activity were the maintenance of an unsubstituted or specifically substituted exocyclic phenyl group on position 2, the preservation of the pyran-4-one ring, and a 6 position which is either unsubstituted or substituted with an oxidizable moiety.
Published Version
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