Ro 6-3129, also known as 16α-ethylthio-6-dehydroretroprogesterone or as 16α-ethylthio-9β,10α-pregna-4,6-diene-3,20-dione, as well as 16α-ethylthiodydrogesterone, is a

progestogen Progestogens, also sometimes written progestins, progestagens or gestagens, are a class of natural or synthetic steroid hormones that bind to and activate the progesterone receptors (PR). Progesterone is the major and most important progestoge ...

of the retroprogesterone group which was developed by

Roche F. Hoffmann-La Roche AG, commonly known as Roche (), is a Switzerland, Swiss multinational corporation, multinational holding healthcare company that operates worldwide under two divisions: Pharmaceuticals and Diagnostics. Its holding company, ...

but was never marketed. It shows greater

potency Potency may refer to: * Potency (pharmacology), a measure of the activity of a drug in a biological system * Virility * Cell potency, a measure of the differentiation potential of stem cells * In homeopathic dilutions, potency is a measure of ho ...

than

dydrogesterone Dydrogesterone, sold under the brand name Duphaston among others, is a progestin drug, medication which is used for a variety of indications, including miscarriage, threatened or recurrent miscarriage during pregnancy, dysfunctional bleeding, i ...

bioassay A bioassay is an analytical method to determine the potency or effect of a substance by its effect on animal testing, living animals or plants (''in vivo''), or on living cells or tissues (''in vitro''). A bioassay can be either quantal or quantit ...

References

Abandoned drugs Conjugated dienes Diketones Organosulfur compounds Pregnanes Progestogens Thioethers Enones {{Genito-urinary-drug-stub