19-Nor-17-alpha-pregna-3,5-dien-20-yn-17-ol, 3-(cyclopentyloxy)-, acetate 19-Nor-17-alpha-pregna-3,5-dien-20-yn-17-ol, 3-(cyclopentyloxy)-, acetate (ester) 19-Norpregna-3,5-dien-20-yn-17-ol, 3-(cyclopentyloxy)-, acetate, (17alpha)- 3-(Cyclopentyloxy)-19-nor-17-alpha-pregna-3,5-dien-20-yn-17-ol acetate 3-(Cyclopentyloxy)-19-nor-17-alpha-pregna-3,5-dien-20-yn-17-ol acetate (ester) 3-(Cyclopentyloxy)-19-nor-17alpha-pregna-3,5-dien-20-yn-17-ol acetate 3-(Cyclopentyloxy)-19-nor-17alpha-pregna-3,5-dien-20-yn-17-yl acetate 3-Cyclopentyl enol ether of norethindrone acetate 3000-39-3 BRN 2186975 EINECS 221-078-4 Norethindrone acetate 3-cyclopentyl enol ether QUINGESTANOL ACETATE Quingestanol acetate [USAN] W 4540