Cholesterol synthesis can proceed via the Kandutsch-Russell pathway, with cholestanol as the penultimate precursor.

“now there's another pathway when Austral doesn't and what determines sort of is if you've got a double bond at that 24 because it's gonna go through that pathway now there's a leno stroll has another pathway that goes through that's gonna wind up with cholesterol and the precursor or the penultimate as we call it the next-to-the-last cholesterol molecule in a chain is on Cola faster all some people call it lay so sterile I call it a foster all la th Oh stir all and that is called the can Dutch rustle pathway”