33631-41-3 BRN 1999616 CCRIS 4283 ER Ethyl retinamide N-Ethylretinamide Retinamide, N-ethyl- Retinamide, N-ethyl-, all-trans- Retinoic acid ethyl amide Ro 8-4968 Vitamin A acid ethylamide all-trans-N-Ethylretinamide