20150315191 | 4-Position Substituted Pyrazolopyrimidine Derivative, And Use Thereof In Drug Preparation - The invention belongs to the technical field of organic synthetic drugs, and particularly relates to a pyrazolopyrimidine derivative and a preparation method and medical uses thereof. The invention provides a new pyrazolopyrimidine derivative mainly having position 4 substituted, i.e., position substituted by Y in formula I. The pyrazolopyrimidine derivative of the invention has a structural formula I as follows: | 11-05-2015 |