l-dehydroascorbic acid

l-de·hy·dro·a·scor·bic ac·id

(dē-hī'drō-as-kōr'bik as'id), The reversibly oxidized form of ascorbic acid; it is antiscorbutic, but is converted in the body to 2,3-diketo-l-gulonic acid, which has no vitamin C activity.