(R)-N4-(3-氯-4-氟苯基)-7-(((四氢呋喃-3-基)氧基)喹唑啉-4，6-二胺(阿法替尼杂质)

(R)-N4-(3-氯-4-氟苯基)-7-(((四氢呋喃-3-基)氧基)喹唑啉-4，6-二胺(阿法替尼杂质)

(R)-N4-(3-Chloro-4-fluorophenyl)-7-((tetrahydrofuran-3-yl)oxy)quinazoline-4，6-diamine(Afatinib Impurity)