noun

• A compound that inhibits the enzyme 17β-hydroxylase and prevents synthesis of glucocorticoids and mineralocorticoids by the adrenal gland, used chiefly for assessment of feedback control of the hypothalamic-pituitary axis in adrenal disease, and sometimes in the treatment of Cushing's syndrome and resistant oedema; 2-methyl-1,2-di-3-pyridyl-1-propanone, C₅ H₄ N·CO·C(CH₃)₂ ·C₅ H₄ N.