Ecdysteroids rubrosterone

Occurrence other than in man The spectrum of A. in vertebrates is, in principle, qualitatively the same as that in humans although there may be quantitative differences and differences with regard to biosynthetic and metabolic details. A. have also occasionally been isolated from plants as metabolites of steroidal secondary substances, e.g., testosterone and androstenedione from pollen of Scottish pine Pinus sylvestris (Pin-aceae) and rubrosterone (2/3,3/S,14a-trihydroxy-5)8-androst-7-ene-6,17-dione), a biological degradation product of an ecdysteroid from Achyranthes rubro-fusca (Amaranthaceae). 

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