#sterol__steroid_alcohol  any of a group of natural steroid alcohols derived from plants or animals; they are waxy insoluble substances
  supertype:  #alcohol  #steroid
  subtype:  #cholesterol__cholesterin  an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues
     subtype:  #HDL_cholesterol  the cholesterol in high-density lipoproteins; the `good' cholesterol; a high level in the blood is thought to lower the risk of coronary artery disease
     subtype:  #LDL_cholesterol__ldlcholesterol  the cholesterol in low-density lipoproteins; the `bad' cholesterol; a high level in the blood is thought to be related to various pathogenic conditions
        subtype:  #oxidized_LDL_cholesterol  LDL cholesterol that has been bombarded by free radicals; it is thought to cause atherosclerosis
  subtype:  #ergosterol  a plant sterol that is converted into vitamin D by ultraviolet radiation

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