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Isoequilin A, which is produced by the acid-induced isomerization of equilin, has been resolved into 3 major components by gas chromatography. Tentative identification of the 3 compounds was made by using combined gas chromatography/mass spectroscopy. One of these compounds, identified as 8-dehydroestrone, closely resembled a component previously identified in pregnant mares’ urine.

Durch Umsetzung der Thiadiazole (I) mit Epichlorhydrin (II) in Gegenwart einer katalytischen Menge Piperidin wird ein Gemisch der Verbindungen (III) und (IV) erhalten.