The present invention relates to particles of N-(5-cyano-4-((2-methoxyethyl)amino)pyridin-2-yl)-7-formyl-6-((4-methyl-2-oxopiperazin-1-yl)methyl)-3,4-dihydro-1,8-naphthyridine-1(2H)-carboxamide, to a process of making said particles, to pharmaceutical compositions comprising said particles and to method of treating cancers using said pharmaceutical compositions.本發明係關於N-(5-氰基-4-((2-甲氧乙基)胺基)吡啶-2-基)-7-甲醯基-6-((4-甲基-2-側氧基哌-1-基)甲基)-3,4-二氫-1,8-萘啶-1(2H)-甲醯胺之顆粒;製備該等顆粒之方法;包含該等顆粒之醫藥組合物;及使用該等醫藥組合物治療癌症之方法。