1 XFK 6-(2-{5-[2-(2-amino-6-methylpyridin-4-yl)ethyl]pyridin-3-yl}ethyl)-4-methylpyridin-2-amine 1.000 2 XFH 6-(2-{3-[2-(2-amino-6-methylpyridin-4-yl)ethyl]phenyl}ethyl)-4-methylpyridin-2-amine 0.926 3 XFJ 6,6'-(pyridine-3,5-diyldiethane-2,1-diyl)bis(4-methylpyridin-2-amine) 0.733