上游原料
isonicotinic acid3-iodopyridine4-chloropyridine4-pyridinesulfonic acid4-nitropyridine3-chloropyridine4-iodopyridinePyridinepyridine 1-oxide4-nitropyridine 1-oxide4-nitropyridine 1-oxide4-nitropyridine 1-oxideisonicotinamide4-bromopyridine4-Cyanopyridine; Pyridine-4-carbonitrile; Isonicotinic acid nitrile; Isonicotinonitrile; iso-Nicotinonitrile4-nitropyridine 1-oxide4-nitropyridine 1-oxide4-nitropyridine 1-oxide
