Paclitaxel-8-Hydro-Bicyclo(3.3.0)octane,"(1S,2S,4S,5S,6R,7aS,8S,9aR,11aS)-4-(((2R,3S)-3-Benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-1-(benzoyloxy)-2,8-dihydroxy-5,7a,12,12-tetramethyl-7-oxododecahydro-1H-2,5a-methanocyclohepta[3,3a]indeno[5,4-b]oxete-6,11a-diyl Diacetate; 3H-4,7a-Methanocyclohept[3,3a]indeno[5,4-b]oxete Benzenepropanoic Acid Derivative",Paclitaxel Impurity