1,3,5(10),6-Estratetraen-3beta-ol-17-one 2208-12-0 3-Heto 3-Hydroxyestra-1,3,5(10),6-tetraen-17-one 6,7-Didehydroestrone 6-Dehydroestrone Dehydro-estrone Estra-1,3,5(10),6-tetraen-17-one, 3-hydroxy- (8CI)(9CI) NSC 48999 delta6,7-Estrone delta6-Estrone