Standards; Steroids; Pharmaceutical/API Drug Impurities/Metabolites;
Cholesterol is a major component of all biological membranes
Rosin, Z., et al.: Physiol. Chem., 124, 282 (1923), Schoenheimer, et al.: J. Biol. Chem., 105, 355 (1934), Gemant, et al.: Life Sci., 1, 233 (1962), Johnson, K., et al.: 4, 457 (1964),