Halcinonide Impurity 1

Chemical Name: (6aS,6bR,6a'S,6b'R,7S,7'S,8aS,8bS,8a'S,8b'S,11aR,11a'R,12aS,12bS,12a'S,12b'S)-8b,8b'-(2,2'-oxybis(acetyl))bis(6b-fluoro-7-hydroxy-6a,8a,10,10-tetramethyl-1,2,5,6,6a,6b,7,8,8a,8b,11a,12,12a,12b-tetradecahydro-4H-naphtho[2',1':4,5]indeno[1,2-d][1,3]dioxol-4-one)

Synonym: 3-O-demethylthiocolchicine