Synonyms: 5b-Bufa-20,22-dienolide, 1b,3b,5,14-tetrahydroxy-19-oxo-, cyclic 1,3,5-orthoacetate(8CI); Bufa-20,22-dienolide, 1,3,5-[ethylidynetris(oxy)]-14-hydroxy-19-oxo-, [1b(R),3b,5b]-; 4H-2,6-Epoxy-4,13a-methanocyclopenta[5,6]naphtho[2,1-d]-1,3-dioxocin,bufa-20,22-dienolide deriv.; Orthoacetic acid, cyclic 1,3,5-ester with 1b,3b,5,14-tetrahydroxy-19-oxo-5b-bufa-20,22-dienolide (8CI); Bersaldegenin1,3,5-orthoacetate; Melianthugenin; NSC 135077