Synonyms: [(1s,2as,2bs,6s,8ar,8bs,10as)-6-hydroxy-8a,10a-dimethyl-1,2,2a,2b,3,5,6,7,8,8a,8b,9,10,10a-tetradecahydrocyclobuta[a]phenanthren-1-yl](2-methyl-1,3-dioxolan-2-yl)methanone;AC1L4RO5;KST-1A5333;39932-40-6;AR-1A8027;16beta-21-Methyl-D-nor-5-pregnen-3beta-ol-20,21-dione 21-ethylene ketal;Methanone, ((3beta,16beta)-3-hydroxy-D-norandrost-5-en-16-yl)(2-methyl-1,3-dioxolan-2-yl)-