乙酸酐 、 (3S,9R,10R,13R,14S,17S)-3,14-Dihydroxy-10,13-dimethyl-17-((1R,2R)-1,2,5-trihydroxy-1,5-dimethyl-hexyl)-1,2,3,4,5,9,10,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-6-one 在
吡啶 作用下,
反应 9.0h,
以45.7%的产率得到2-deoxy-20-hydroxyecdysone 3,22-diacetate