we used a differential ria to show that a major product of the prothoracic glands in vitro cross-reacts with antiserum ( 20-hydroxyecdysone-2-succinylthyroglobulin amide ; h-2 ) that retains affinity to ecdysteroids having a modified a ring .
C0013495
20-hydroxyecdysone
C0058915
ecdysteroids