<unk> , or 9-cis-retinoic acid, is a form of vitamin A. It is also used in medicine as an antineoplastic (anti-cancer) agent developed by Ligand Pharmaceuticals. It is a first generation retinoid. Ligand gained Food and Drug Administration (FDA) approval for<unk>  in February 1999.
Alitretinoin
Tretinoin
Isotretinoin
Clobetasol
Clobetasol propionate
Ulobetasol propionate
Urodilatin
Cortistatin 