Docetaxel 13-Oxo impurity

Chemical Name: (2aR,4S,4aS,6R,12S,12bS)-12b-acetoxy-11-hydroxy-4a,8,13,13-tetramethyl-5,9-dioxo-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-12-yl benzoate

Synonym: 2,2'-(piperazine-1,4-diyl)bis(N-(4-aminophenyl)-N-methylacetamide)