ethyl 5-(1,3-dioxolanyl)-1H-pyrrolo<2,3-c>pyridine-2-carboxylate

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

2,4-二甲基-5-硝基吡啶