The present invention relates to a novel co-crystal of the compound of formula (I):wherein the co-former molecule is bisphosphate hemihydrate, to processes for the preparation of the co-crystal, to pharmaceutical compositions containing the co-crystal, to the use of such a co-crystal in the manufacture of a medicament for use in the treatment of cancer and to methods of treating such diseases in the human or animal body by administering a therapeutically effective amount of such a co-crystal.本發明係關於式(I)化合物之新穎共晶體，其中共形成物分子係二磷酸半水合物；係關於製備該共晶體之方法、含有該共晶體之醫藥組合物、此一共晶體在製造用於治療癌症之藥劑中之用途及藉由投與治療有效量之此一共晶體來治療人類或動物體內該等疾病之方法。
