Synonyms: Corticosterone,11-deoxy-18-hydroxy-, cyclic 20,18-hemiacetal (6CI); Pregn-4-ene-3,20-dione,18,21-dihydroxy-, cyclic 20,18-hemiacetal (8CI);1H,9H-Naphth[2',1':4,5]indeno[1,7a-c]furan, pregn-4-en-3-one deriv.;18,20-Epoxy-20,21-dihydroxypregn-4-en-3-one