<unk>  (ecdysterone or<unk>  is a naturally occurring ecdysteroid hormone which controls the ecdysis (moulting) and metamorphosis of arthropods. It is therefore one of the most common moulting hormones in insects, crabs, etc. It is also a phytoecdysteroid produced by various plants, including Cyanotis vaga, Ajuga turkestanica and Rhaponticum carthamoides where its purpose is presumably to disrupt the development and reproduction of insect pests. In arthropods,<unk>  acts through the ecdysone receptor. Although mammals lack this receptor,<unk>  may affect mammalian (including human) biological systems in vitro, but there is uncertainty whether any in vivo or physiological effects occur.<unk>  is an ingredient of some supplements that aim to enhance physical performance. In humans, it is hypothesized to bind to the estrogen receptor beta (ERβ) protein-coding gene.
20-Hydroxyecdysone
Polyestriol phosphate
Estradiol hexahydrobenzoate
Estradiol diundecylate
17β-Dihydroequilin
Anordiol
17α-Dihydroequilin
Estriol sulfate glucuronide