(17alpha)-17-Hydroxy-26-(iodo-125I)-19,21,27-trinorcholest-4-en-20(22)-yne-3-one 123303-98-0 17-(6'-Iodohex-1'-ynyl)-19-nortestosterone 17-Ihnt 19,21,27-Trinorcholest-4-en-20(22)-yne-3-one, 17-hydroxy-26-(iodo-125I)-, (17alpha)-