A group of polycyclic compounds closely related biochemically to TERPENES. They include cholesterol, numerous hormones, precursors of certain vitamins, bile acids, alcohols (STEROLS), and certain natural drugs and poisons. Steroids have a common nucleus, a fused, reduced 17-carbon atom ring system, cyclopentanoperhydrophenanthrene. Most steroids also have two methyl groups and an aliphatic side-chain attached to the nucleus. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Synonyms: 0, Steroid, Catatoxic Steroids, Steroids, Catatoxic, Steroids
Instance information
general or unspecified; prefer specific steroid groups or specific steroids; PLANT STEROIDS see PHYTOSTEROLS is also available ,1963; CATATOXIC STEROIDS was heading 1974-95
D013256