17-alpha-Butadiynyl-17-beta-hydroxy-3-methoxy-1,3,5(10)-estratriene 17-alpha-Butadiynyl-3-methoxyestra-1,3,5(10)-trien-17-beta-ol 1986-48-7 BRN 2008716 ESTRA-1,3,5(10)-TRIEN-17-beta-OL, 17-alpha-BUTADIYNYL-3-METHOXY-