What is "estrane"

n. (context organic compound English) A steroid hydrocarbon that is the basis of several female hormones

Estrane is a steroid derivative.

Estrenes are estrane derivatives that contain a double bond like nandrolone.

According to some sources, a 19-nor steroid (estrane) has the advantageous property that it is more orally active than the corresponding androstane, particularly in the case of the progestin drugs since progesterone is not orally active (vs 19-Norprogesterone).