New compounds: Steroidal spiroethers.
D055598:Chemical Phenomena; D002621:Chemistry; D004987:Ethers / Q000138:chemical synthesis; D009682:Magnetic Resonance Spectroscopy; D013141:Spiro Compounds / Q000138:chemical synthesis; D013256:Steroids / Q000138:chemical synthesis*
D004987:Ethers; D013141:Spiro Compounds; D013256:Steroids