A<unk>  is a terpenoid lipid characterized by a carbon skeleton with four fused rings, generally arranged in a 6-6-6-5 fashion.<unk> s can vary by the functional groups attached to these rings and the oxidation state of the rings. Hundreds of distinct<unk> s are found in plants, animals, and fungi. All<unk> s are biosynthetically derived either from the sterol lanosterol (animals and fungi) or the sterol cycloartenol (plants). Both sterols are derived from the cyclization of the triterpene squalene.
Steroid
Antibiotic
Antimicrobial
Analgesic
Anti inflammatory medications
Blood substitutes
Radionuclide
Local anesthetic