2-Hydroxyethyl retinamide 33631-47-9 BRN 2161307 CCRIS 4284 HER Hydroxyethyl retinamide N-(2-Hydroxyethyl)retinamide N-2-Hydroxyethyl retinamide Retinamide, N-(2-hydroxyethyl)- Retinoic acid 2-hydroxyethylamide Ro 8-4969