Retinoid

NHK (IC-50, M)

SCC-25 (IC-50, M)

trans-Retinoic acid

2.0 × (E−9)

3.0 × (E−6)

13-cis-Retinoic acid

1.0 × (E−8)

1.0 × (E−7)

4-Hydroxyphenylretinamide

1.0 × (E−8)

1.0 × (E−7)

cis-Retinol

2.5 × (E−8

5.0 × (E−6)

trans-Retinol

4.0 × (E−8)

9.0 × (E−7)

trans-Retinyl methyl ether

1.0 × (E−7)

1.0 × (E−5)

trans-Retinoyl-glycine

3.0 × (E−7)

3.0 × (E−6)

N-Ethylretinamide

3.6 × (E−6)

1.8 × (E−6)

trans-Retinylpropyl ether

8.0 × (E−7)

5.0 × (E−6)

trans-Retinylpropyl ether

8.0 × (E−7)

5.0 × (E−6)