Synonyms: 24-Nor-5a,13a,14b,17a-chola-20,22-diene-3,16-dione,14,15b:21,23-diepoxy-7a-hydroxy-4,4,8-trimethyl-,acetate (8CI); 14,15-Epoxy-14H-cyclopenta[a]phenanthrene,24-norchola-20,22-diene-3,16-dione deriv.; 14-Epoxyazadiradione; Azadiradione,epoxy-1,2-dihydro-; Dihydronimbinin; Epoxy-1,2-dihydroazadiradione; Nimbinin,dihydro-