Synonyms: 16-beta-Carboxamide-(17-alpha)-isoprogesterone;3,20-Dioxo-17-alpha-pregn-4-ene-16-beta-carboxamide;17-alpha-Pregn-4-ene-16-beta-carboxamide, 3,20-dioxo-;AC1L43XM;LS-118605;(8S,9S,10R,13S,14S,16S,17R)-17-acetyl-10,13-dimethyl-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthrene-16-carboxamide;1434-68-0