11-Thienyl-17-ethynyl-19-norandrosta-4,9-dien-17-ol-3-one 17-Hydroxy-11-(2-thienyl)-19-norpregna-4,9-dien-20-yn-3-one 19-Norpregna-4,9-dien-20-yn-3-one, 17-hydroxy-11-(2-thienyl)-, (11beta,17alpha)- 67983-56-6 RU 25055 RU-25055