A 43-year-old female patient was delivered to the hospital in grave condition. She suffers from Addison's disease. The patient had been regularly taking prednisolone but a week before she stopped taking this drug. Objectively: sopor, skin and visible mucous membranes are pigmented, skin and muscle turgor is decreased. Heart sounds are muffled, rapid. AP- 60/40 mm Hg, heart rate - 96/min. In blood: Na -120 mi-llimole/l, K - 5,8 millimole/l. Development of this complication is primarily caused by the deficit of the following hormone: