(2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12b-Acetoxy-9-(((2R,3R)-3-((tert-butoxycarbonyl)amino)-2-hydroxy-3-phenylpropanoyl)oxy)-4,6,11-trihydroxy-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]oxet-12-yl Benzoate is a synthetic analogue of Paclitaxel (P132500), an antineoplastic of clinical interest for its activity in inhibiting microtubule disassembly and potency to treat lung, ovarian, breast cancer, and advanced forms of Kaposi''s sarcoma.