Synonyms: 5b-Cholest-7-en-6-one, 2b,3b,14,20,22,25-hexahydroxy-, cyclic 2,3:20,22-diacetalwith acetone, (22R)- (8CI); 5H-Cyclopenta[7,8]phenanthro[2,3-d][1,3]dioxole,cholest-7-en-6-one deriv.; 20-Hydroxyecdysone 2,3:20,22-diacetonide;20-Hydroxyecdysone diacetonide; Ecdysterone 2,3:20,22-diacetonide