(2r, 3s) -3- tert.- butoxycarbonylamino - 2-hydroxy - 3 - 4.10 beta-diacetoxy phenylpropionate - 2 - alpha-benzoyloxy-5beta, 20 - epoxy - 1 - hydroxy - 9 - hollow - 19 - nor - cyclopropa g tax - 11eno - 13alfa - ila and process for preparing it

摘要

A 4,10 beta -diacetoxy-2 alpha -benzoyloxy-5 beta ,20-epoxy-1-hydroxy-9-oxo-19-nor-cyclopropa[g]tax-11-ene-13 alpha -yl (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenylpropionate dihydrate, and the preparation thereof by crystallisation from a water-alcohol or water-ketone solution, are disclosed.