ring glands or brain-ring gland complexes from third-instar drosophila melanogaster larvae secreted ecdysone [ ( 22r ) -2beta,3beta,14alpha,22,25-pentahydroxy-5beta-cholest-7-en-6-one ] and two less polar ecdysteroids ( lp1 and lp2 ) in vitro .
C0013494
ecdysone
C0058915
ecdysteroids