(25R)-Spirost-4-ene-3,6-dione

Synonyms: Diosgenin-3,6-dione, Diosgenin impurity, 25D-Spirost-4-ene-3,6-dione, (5'R,6aR,6bS,8aS,8bR,9S,10R,11aS,12aS,12bS)-5',6a,8a,9-tetramethyl-1,3',4',5,5',6,6a,6b,6',7,8,8a,8b,9,11a,12,12a,12b-octadecahydrospiro[naphtho[2',1':4,5]indeno[2,1-b]furan-10,2'-pyran]-2,4-dione