中间体3-Pyridinecarboxaldehyde3-***甲醛500-22-1≥98%液体中间体4-Pyridinecarboxaldehyde4-***甲醛872-85-5≥98%黄棕色液体2-羟基***142-08-53-HydroxyPyridine3-羟基***109-00-24-羟基***626-64-2中间体2-Aminopyridine2-氨基***504-29-0C5H6N2中间体3-Aminopyridine3-氨基***462-08-8C5H6N2中间体4-Aminopyridine4-氨基***504-24-5C5H6N2中间体Piperidine-2-carboxylicacid2-***甲酸535-75-1≥98%中间体Piperidine-3-carboxylicacid3-***甲酸498-95-3≥97%中间体Piperidine-4-carboxylicacid4-***甲酸498-94-2≥99%中间体N-Boc-4-***甲酸84358-13-4≥99%)