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Skeletal formula of ecdysone
Ball-and-stick model of the ecdysone molecule
IUPAC name
(2S,3R,5R,9R,10R,13R,14S,17R)-17- [(2S,3R)-3,6-dihydroxy-6-methylheptan- 2-yl]-2,3,14-trihydroxy-10,13-dimethyl- 2,3,4,5,9,11,12,15,16,17-decahydro- 1H-cyclopenta[a]phenanthren-6-one
3D model (Jmol)
ECHA InfoCard 100.020.692
Molar mass 464.63 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Ecdysone is a steroidal prohormone of the major insect molting hormone 20-hydroxyecdysone, which is secreted from the prothoracic glands. Insect molting hormones (ecdysone and its homologues) are generally called ecdysteroids. Ecdysteroids act as moulting hormones of arthropods but also occur in other related phyla where they can play different roles. In Drosophila melanogaster, an increase in ecdysone concentration induces the expression of genes coding for proteins that the larva requires, and it causes chromosome puffs (sites of high expression) to form in polytene chromosomes. Ecdysteroids also appear in many plants mostly as a protection agent (toxins or antifeedants) against herbivorous insects. These phytoecdysteroids have been reputed to have medicinal value and are part of herbal adaptogenic remedies like Cordyceps, yet an ecdysteroid precursor in plants has been shown to have cytotoxic properties.[1] A pesticide sold with the name MIMIC has ecdysteroid activity, although its chemical structure has little resemblance to the ecdysteroids.

See also[edit]

External links[edit]

  • Ecdybase, The Ecdysone Handbook - a free online ecdysteroids database


  1. ^ Wang YS, Yang JH, Luo SD, Zhang HB, Li L, Molecules. 2007;12(3):536-42