17-beta-Hydroxyestr-4-en-3-one 3-cyclopentylpropionate (ester) 17beta-Hydroxyestr-4-en-3-one 17-(3-cyclopentylpropionate) 19-Nortestosterone cyclopenytlpropionate 4-09-00-00048 (Beilstein Handbook Reference) 601-63-8 BRN 3172801 EINECS 210-006-7 ESTR-4-EN-3-ONE, 17-beta-HYDROXY-, 3-CYCLOPENTYLPROPIONATE (ester) Estr-4-en-3-one, 17-(3-cyclopentyl-1-oxopropoxy)-, (17beta)- (9CI) Estr-4-en-3-one, 17beta-hydroxy-, cyclopentanepropionate (8CI) NSC 40578 Nortestosterone cypionate