A member of the ecdysteroid family. Ecdysone receptor (EcR) agonist. An analog of ecdysone with similar properties to muristerone A. Induces expression of β-galactosidase to levels similar to those obtained with muristerone A induction. A reliable and economical substitute for muristerone A as an inducer for the ecdysone-inducible mammalian expression system.