21-(Acetyloxy)pregna-1,4,9(11),16-tetraene-3,20-dione, EINECS 253-497-3, 16-tetraene-3,20-dione 21-acetate, 21-hydroxypregna-1,4,9(11), 21-acetoxy-pregna-1,4,9(11),16-tetraene-3,20-dione, 21-Acetoxy-pregna-1,4,9(11),16-tetraen-3,20-dion, 3,20-dioxopregna-1,4,9(11),16-tetraen-21-yl acetate, 21-hydroxy-pregna-1,4,9(11),16-tetraene-3,20-dione 21-acetate, 2-((8S,10S,13S,14S)-10,13-dimethyl-3-oxo-6,7,8,10,12,13,14,15-octahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethyl acetate