Estr-4-ene-3,17-dione,cyclic 3-(1,2-ethanediyl mercaptole); Estr-4-ene-3,17-dione, cyclic 3-(ethylenemercaptole) (7CI); Spiro[3H-cyclopenta[a]phenanthrene-3,2'-[1,3]dithiolane],estr-4-ene-3,17-dione deriv.
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