Synonyms: 16-alpha-Chloroprogesterone;16-alpha-Chloropregn-4-ene-3,20-dione;Pregn-4-ene-3,20-dione, 16-alpha-chloro-;AC1L447G;LS-118635;(6S,8S,9S,10R,13S,14S,17S)-17-acetyl-6-chloro-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one;1816-80-4