Synonyms: B-Norspirostan-6-carboxaldehyde,3,5-dihydroxy-, (3b,5b,6b,25R)-; Leontogenin;Spiro[benz[6,7]-as-indaceno[2,3-b]furan-2(3H),2'-[2H]pyran]-10-carboxaldehyde,eicosahydro-8,9a-dihydroxy-3,3b,5',5b-tetramethyl-, [2R-[2a(R*),3a,3aa,3bb,5aa,5bb,8b,9ab,10b,10ab,10ba,11aa]]-