Etretinate (Standard) is the standard substance of Etretinate, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Etretinate (Ro 10-9359) is an oral aromatic retinoid acid which is effective in psoriasis and other dermatological syndromes. It activates retinoid receptors, causing an induction of cell differentiation, inhibition of cell proliferation, and inhibition of tissue infiltration by inflammatory cells.