18,19-Dinor-17a-pregna-4,9,11-trien-20-yn-3-one,17-hydroxy-13-propyl- (7CI,8CI); 17a-Ethynyl-13b-propyl-3-oxo-4,9,11-estratrien-17b-ol; R 2715; RR 2715; RU 2715
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