1 FEN N-(4-hydroxyphenyl)all-trans retinamide 1.000 2 RET Retinal 0.724 3 RTL Retinol 0.724 4 ETR N-ethyl retinamide 0.710 5 4XW (5s,6s,9r,13r)-2,3-didehydro-5,6,7,8,9,10,11,12,13,14-decahydroretinoic acid 0.700 6 9CR (9cis)-retinoic acid 0.700 7 OXR 4-oxoretinol 0.700 8 REA Retinoic acid 0.700