redox properties of the compounds : ascorbic acid , dehydroascorbic acid , thiols such as glutathion , cistein , british anti-lewisite ( bal ) , thiamin , riboflavin , para amino benzoic acid , biotin , 1-4 dihydronaphtoquinone and flavonoids ( flavone and derived salts , quercetin rutin , 1-epicatechin and dimer ) are established by direct and pulse polarography .
C0003968
ascorbic
C0011177
dehydroascorbic acid