Cholestenes are derivatives of cholestanes that have a double bond.If there are two double bonds, the molecule is known as a 'cholestadiene'. Examples include fusidic acid, lanosterol, and stigmasterol. Cholestenes are derivatives of cholestanes that have a double bond.If there are two double bonds, the molecule is known as a 'cholestadiene'. Examples include fusidic acid, lanosterol, and stigmasterol.