Cholesterol CH HO H Common biological intermediate. Probably a precursor to other steroids. Side chain at C17 and double bond C5-C6. => Chapter 25 17Chapter 25 17 Cholesterol • Common biological intermediate. • Probably a precursor to other steroids. • Side chain at C17 and double bond C5-C6. => CH3 H HO H H H H CH3 3 5 6 17