1 F8M 2-amino-7-[3-(dimethylamino)propyl]-5-oxo-5h-[1]benzopyrano[2,3-B]pyridine-3-carboxylic acid 1.000 2 ANW 2-amino-7-(1-methylethyl)-5-oxo-5h-chromeno[2,3-B]pyridine-3-carboxylic acid 0.808