1 9HG N~2~-cyclopentyl-6,7-dimethoxy-N~2~-methyl-N~4~-(1-methylpiperidin-4-yl)quinazoline-2,4-diamine 1.000 2 90P N~2~-cyclohexyl-N~4~-(1-ethylpiperidin-4-yl)-6,7-dimethoxy-N~2~-methylquinazoline-2,4-diamine 0.875 3 9HJ 6,7-dimethoxy-N~2~-methyl-N~4~-(1-methylpiperidin-4-yl)-N~2~-propylquinazoline-2,4-diamine 0.750 4 7KZ N4-(1-methylpiperidin-4-yl)-n2-hexyl-6,7-dimethoxyquinazoline-2,4-diamine 0.706