the effects of topically applied 12-o-tetradecanoylphorbol-13-acetate ( tpa ) on the level of ascorbic acid in the epidermis and the effects of topically applied ascorbic acid , ascorbyl palmitate ( a synthetic lipophilic derivative of ascorbic acid ) , palmitic acid and sorbitan monopalmitate on tpa-induced epidermal ornithine decarboxylase activity , epidermal dna synthesis , and the promotion of skin tumors were evaluated in female cd-1 mice .
C0049690
ascorbyl palmitate
C0003968
ascorbic