| 3-(cyclopentyloxy)-19-nor-17-alpha-pregn-4-en-20-yn-17-beta-o acetate (este |
| 17-alpha-ethynyl-19-nortestosterone acetate cyclopentyl enol ether |
| 3-(cyclopentyloxy)-19-nor-17-alpha-pregn-4-en-20-yn-17-beta-ol acetate (ester |
| entac-6 |
| 3-(cyclopentyloxy)-19-nor-17-alpha-pregn-4-en-20-yn-17-beta-o acetate (ester) |
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