11a,16b,17,21-Tetrahydroxy-pregna-1,4-diene-3,20-dione

16A hydroxyprednisolone, an intermediate of glucocorticoid API, is an intermediate for the synthesis of approved ned drugs, including triamcinolone acetonide, budesonide, cyclosonide and Desonide. Neders are inhaled glucocorticoids, which are widely used in the treatment of refractory asthma and inflammation. Prednisolone is a kind of synthetic medium effective glucocorticoid, similar to prednisone, and has anti-inflammatory and anti allergy effects. It has strong anti-inflammatory effect and weak water salt metabolism. Suitable for the treatment of eczema, dermatitis and other allergic diseases, lupus erythematosus, dermatomyositis and other connective tissue diseases.