(8R,10S,13S,14S,17R)-10,13-dimethyl-3,5'-dioxospiro[2,6,7,8,12,14,15,16-octahydro-1H-cyclopenta[a]phenanthrene-17,2'-oxolane]-7-carbonitrile

This compound is a spirocyclic steroid derivative with a nitrile substituent, specifically designed as a pharmaceutical intermediate for the synthesis of aldosterone impurities. It is characterized by a pentacyclic ring system containing both an ester and an ether functionality, making it a key building block in steroid research and manufacturing.