Phosphonic acids. IX. Steroidal 21a-phosphonate esters.
D002625:Chemistry, Organic; D007259:Infrared Rays; D055601:Organic Chemistry Phenomena; D063065:Organophosphonates; D011374:Progesterone; D013256:Steroids; D014466:Ultraviolet Rays
D063065:Organophosphonates; D013256:Steroids; D011374:Progesterone