for the following products
7-Methoxy-6-(3-morpholin-4-yl-propoxy)-3H-quinazolin-4-one | 7-Methoxy-6-(3-morpholinopropoxy)-3,4-dihydroquinazolin-4-one | 7-Methoxy-6-[3-(morpholin-4-yl)propoxy]-1,4-dihydroquinazolin-4-one | Gefitinib impurity 5 and 7-Methoxy-6-(3-morpholin-4-propoxy)quinazolin-4(3H)-one
