19-Nor-17a-pregna-4,20-dien-3-one,17-hydroxy- (6CI,7CI,8CI); 17a-Vinyl-17b-hydroxy-D4-estren-3-one; 17a-Vinyl-19-nortestosterone; 17b-Hydroxy-17a-vinylestr-4-en-3-one;19-Nortestosterone, 17-ethenyl-; Neoprogestin; Nor-progestelea; Norvinisterone;SC 4641
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