N,O-Bis(benzyloxycarbonyl) Halofuginone

(2R,3S)-rel-2-[3-(7-Bromo-6-chloro-4-oxo-3(4H)-quinazolinyl)-2-oxopropyl]-3-[[(phenylmethoxy)carbonyl]oxy]-1-piperidinecarboxylic Acid Phenylmethyl Ester;