1 1Q7 6,6'-{[(2r)-3-aminopropane-1,2-diyl]bis(oxymethanediyl)}bis(4-methylpyridin-2-amine) 1.000 2 1Q6 6,6'-{[(2s)-3-aminopropane-1,2-diyl]bis(oxymethanediyl)}bis(4-methylpyridin-2-amine) 1.000