Among the following, the natural product that is a steroid and contains an $\alpha, \beta$-unsaturated ketone is
(a)estrone
(b)prostaglandin
(c)cortisone
(d)morphine
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Cortisone is a steroid whose ring A carries a 4-en-3-one (α,β-unsaturated ketone). Estrone has an aromatic A ring, prostaglandins and morphine are not steroids.