BMS493 is an inverse pan- retinoic acid receptor (RAR) agonist. BMS493 increases nuclear corepressor interaction with RARs . BMS493 also could prevent retinoic acid-induced differentiation . BMS493 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.