PHOSPHATE OF EPIDERMAL GROWTH FACTOR RECEPTOR INHIBITOR, CRYSTALLINE FORM OF PHOSPHATE, AND PREPARATION METHOD

摘要

The present invention relates to a phosphate crystalline form A of the compound of formula (I), and a preparation method for the phosphate crystalline form A. The phosphate crystalline form A has advantageous properties such as good solubility, low hygroscopicity and process developability. The preparation method is simple and low-cost, and has significant value for the future optimisation and development of the drug.