25-Deoxy-20-Hydroxyecdysone

Also known as Ponasterone A.  An ecdysteroid and analog of 20-hydroxyecdysone.  25-Deoxy-20-Hydroxyecdysone is sometimes listed as a component of standardized extracts used in bodybuilding supplements, although there is little information on what effects – if any – it has on mammals when given in isolation (FYI: one chemical supplier states it’s “inert to mammalian physiology”).