Docetaxel Impurity 23

Chemical Name: 5-((2aR,4S,4aS,6R,9S,11S,12S,12bS)-12b-acetoxy-12-(benzoyloxy)-11-hydroxy-4a,8,13,13-tetramethyl-5-oxo-4,6-bis(((2,2,2-trichloroethoxy)carbonyl)oxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-9-yl) 3-(tert-butyl) (4R,5R)-2,2-dimethyl-4-phenyloxazolidine-3,5-dicarboxylate