19455-06-2 21090-23-3 2365-07-3 490-83-5 DEHYDROASCORBIC ACID DHAA Dehydro-L-ascorbic acid Dehydroascorbate EINECS 207-720-6 L-Ascorbic acid, dehydro- L-Dehydroascorbic acid L-Threo-hexo-2,3-diulosono-1,4-lactone L-threo-2,3-Hexodiulosonic acid, gamma-lactone Oxidized ascorbic acid Oxidized vitamin C