Corticosterone. Computer artwork of part of a molecule of the steroid hormone corticosterone (chemical formula: C21.H30.O4). The atoms are shown as spheres and the bonds between them are shown as cylinders. The atoms are colour-coded: carbon (metallic grey), hydrogen (blue) and oxygen (red). Corticosterone is a hormone produced in the adrenal glands above the kidneys. It is one of the most important corticosteroids and influences carbohydrate, sodium and potassium metabolism and it is needed for the formation of glycogen.