Paclitaxel 10,13-Bis Side Chain

(2R,2’R,3S,3’S)-(2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12b-acetoxy-12-(benzoyloxy)-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,9-diyl bis(3-benzamido-2-hydroxy-3-phenylpropanoate)