Crystalline form of alkynyl pyridine prolyl hydroxylase inhibitor and method for preparing same

摘要

A crystalline form of alkynyl pyridine prolyl hydroxylase inhibitor and a method for preparing same are described. Specifically, a new crystalline form of alkynyl pyridine prolyl hydroxylase inhibitor as represented by formula (I) is described. The new crystalline form of the present invention has good stability and may be better used for clinical treatment.;