Synonyms: 17-alpha-(2-Butenyl)-17-hydroxyestr-4-en-3-one;ESTR-4-EN-3-ONE, 17-alpha-(2-BUTENYL)-17-HYDROXY-;AC1O5JZ6;LS-64842;(17R)-17-[(E)-but-2-enyl]-17-hydroxy-13-methyl-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one;95285-82-8