benzyl 4-[4-(2-methoxy-2-oxoethoxy)-3-nitrobenzylidene]piperidine-1-carboxylate

4-吡啶甲醛

4-(4-methoxybenzyl)pyridine

tert-butyl 4-(4-(2-methoxy-2-oxoethoxy)-3-nitrobenzyl)piperidine-1-carboxylate

4-(pyridin-4-ylmethyl)phenol