Methyl 5-bromonicotinate3-Bromo-5-(methoxycarbonyl)pyridineMethyl 5-bromopyridine-3-carboxylate5-溴烟酸甲酯5-溴吡啶-3-甲酸甲酯Methyl 5-bromonicotinateMethyl 5-bromopyridine-3-carboxylate5-Bromopyridine-3-carboxylic acid methyl ester5-溴吡啶-3-羧酸甲酯5-Bromonicotinic acid methyl ester5-溴烟酸甲酯Methyl 5-bromonicotinate