Zymosterol is a 3beta-sterol and a cholestanoid. It has a role as a mouse metabolite, a Saccharomyces cerevisiae metabolite and a human metabolite. It derives from a hydride of a 5alpha-cholestane.

24,25-dihydrolanosterol is a 3beta-sterol formed from lanosterol by reduction across the C-24C-25 double bond. It has a role as a mouse metabolite and a human metabolite. It is a tetracyclic triterpenoid and a 3beta-sterol. It is functionally related to a lanosterol.