131545-89-6 19-Norpregna-4,20-dien-3-one, 17-hydroxy-21-iodo-7-methyl-, (7alpha,17alpha,20E)- 7-Methyl-17-(2'-iodovinyl)-19-nortestosterone 7alpha-Methyl-17alpha-(E-2'-(125I)-iodovinyl)-19-nortestosterone MIVNT