3,3-dimethyl-1-(3-nitropyridin-2-yl)-2H-indole

1-(2-nitropyridin-3-yl)piperidine-2-carboxylic acid

methyl 1-(2-nitropyridin-3-yl)piperidine-2-carboxylate

4-(2-氯-3-吡啶)吗啉

4-(2-bromopyridin-3-yl)morpholine