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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)

Year introduced: 1963

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Tree Number(s): D04.210.500

MeSH Unique ID: D013256

Entry Terms:

  • Steroid
  • Catatoxic Steroids
  • Steroids, Catatoxic

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