Synonyms: Corticosterone,9-fluoro-17-hydroxy-2-methyl- (6CI); Pregn-4-ene-3,20-dione, 9-fluoro-11b,17,21-trihydroxy-2a-methyl- (7CI,8CI); 2a-Methyl-9a-fluorocortisol; 2a-Methyl-9a-fluorohydrocortisone; 9a-Fluoro-11b,17a,21-trihydroxy-2a-methylpregn-4-ene-3,20-dione; 9a-Fluoro-2a-methylcortisol