Ecdysteroids from Ajuga reptans plants, grown at the northern limit of
the middle taiga subzone of the northeastern region of the European p
art of Russia, have been identified. For the first time, ajugasteron B
was isolated, along with other ecdysteroids characteristic of this sp
ecies: polypodine B, 20-hydroxyecdysone, 29-norcyasterone, 29-norsengo
sterone, sengosterone, and ajugalactone.