[2aR,4S,4aS,6R,9S(2R,3S),11S,12S,12aR,12bS]-6,12b-Diacetoxy-9-(3-benzamido-2-hydroxy-3-phenylpropionyloxy)-12-benzoyloxy-4-[2-[N,N-bis[2-[4-[4-[N,N-bis(2-chloroethyl)amino]phenyl]butyryloxy]ethyl]amino]acetoxymethoxy]-11-hydroxy-4a,8,13,13-tetramethyl-2a,