288258-18-4
→
298692-34-9
6-(2-chloroacetyl)pyridine-2-carboxylic acid
ethyl 3-oxo-3-(6-methoxycarbonyl-2-pyridyl) propionate
145739-56-6
6-(2-(3,4-二乙氧基苯基)噻唑-4-基)甲酸吡啶