Cholesterol. Note OH group at position 3, and double bond between 5 and 6.

Steroid nomenclature, for reference with above diagram.)

Cholestane is a saturated 27-carbon steroid precursor which serves as the basis for many organic molecules. They are classified in two families:

• Sterols (with an alcohol group)
• Cholestenes (with a double bond)

Some molecules, like cholesterol, are both a sterol and a cholestene.

[edit] External links

• MeSH Cholestanes
• PubChem

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