Representative ecdysones of arthropods and plants

compounds variant of ecdysone structure occurrence

C₂₇ steroids

ecdysone

( b1;-ecdysone) 2 b2;,3 b2;,14 b1;,22,25-pentahydroxy-5 b2;-cholest-7-en-6-one silkworm, Bombyx mori; oak silk moth, Antheraea pernyi, and other insects; also the ferns Pteridium aquilinum and Polypodium vulgare and Osmunda species

ecdysterone, crustecdysone

( b2;-ecdysone) 20 b1;-hydroxy- Bombyx mori, Antheraea pernyi, and other insects; crab, Callinectes sapidus, and crayfish, Jasus lalandei; the conifer, Podocarpus elatus, the yew, Taxus baccata, and several ferns

2-deoxycrust-

ecdysone 2-deoxy-20 b1;-hydroxy- Jasus lalandei

callinecdysone A 20,26-dihydroxy-, 25-deoxy- Callinectes sapidus (premolting)

C₂₈ steroids

callinecdysone B 20-hydroxy-, 24-methyl- Callinectes sapidus (postmolting)

makisterone B 20,26-dihydroxy-, 24-methyl-25-deoxy- Podocarpus macrophyllus

C₂₉ steroids

makisterone C 20-hydroxy-, 24-ethyl- Podocarpus macrophyllus

cyasterone 20,22-dihydroxystigmasteno-26,28-lactone side chain Cyathula capitata and several Ajuga species