2-aminomethyl-4-chlorophenoxyacetic acid tert-butyl ester

(2S,3S,4R,5R)3-azido-5-{6-[5-chloro-2-(2-oxo-2-piperazin-1-yl-ethoxy)-benzylamino]-purin-9-yl}-4-hydroxy-tetrahydro-furan-2-carboxylic acid methylamide