1.1.3.16 20-hydroxyecdysone + O2 probably part of the catabolic system that inactivates the molting hormones 1.1.3.16 20-hydroxyecdysone + O2 first step in reaction sequence for the conversion of ecdysone and 20-hydroxyecdysone to their 3(alpha)-epimers 1.1.3.16 ecdysone + O2 - 1.1.3.16 ecdysone + O2 probably part of the catabolic system that inactivates the molting hormones 1.1.3.16 ecdysone + O2 first step in reaction sequence for the conversion of ecdysone and 20-hydroxyecdysone to their 3(alpha)-epimers 1.1.3.16 ecdysone + O2 inactivation of ecdysone