Used in the synthesis of steroidal drugs, particularly as an intermediate in the preparation of corticosteroids and anabolic agents. It serves as a key building block in modifying steroid ring structures to achieve desired biological activity. Commonly employed in pharmaceutical research for developing anti-inflammatory, immunosuppressive, and hormone-based therapies. Its spiro structure and ketone functional groups allow selective chemical modifications, making it valuable in medicinal chemistry for optimizing drug potency and metabolic stability.