3-Chloropyridine-4-carboxaldehyde (CAS NO.72990-37-5), its Synonyms are 3-Chloro-4-formylpyridine ; 3-Chloro-4-pyridinecarboxaldehyde ; 3-Chloroisonicotinaldehyde ; 4-Pyridinecarboxaldehyde,3-chloro- .