ethyl 5-formyl-1H-pyrrolo[2,3-c]pyridine-2-carboxylate

2,4-二甲基吡啶

4-methyl-5-nitropyridine-2-carboxaldehyde

2-(1,3-dioxolan-2-yl)-4-methyl-5-nitropyridine

ethyl 2-(1,3-dioxolanyl)-5-nitro-4-pyridinepyruvate