3d image of 24-ethyl coprostanol skeletal formula

24-ethyl coprostanol carbon stanol biohydrogenation sitosterol biomarker 3d endocrine enzyme atom precursor endogenous norsteroid cell biomolecule molecular metabolic isolated analogue mineralocorticoid hormonal prohormone hormone geometry white background substrate molecule metabolite steroid human metabolome database synthesis path ball cycle derivative level biosynthesis mechanism therapy hmdb steroidal catabolism biochemistry model biology metabolism