Nicotinic acid ''N''-oxide is an

organic compound In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. T ...

with the formula (HO₂C)C₅H₄NO. It is the ''N''-oxide of nicotinic acid ((HO₂C)C₅H₄N). It is prepared by oxidation of nicotinic acid or the hydrolysis of 3-cyanopyridine ''N''-oxide. The compound is a precursor to the popular drugs

niflumic acid Niflumic acid is a drug used for joint and muscular pain. It is categorized as an inhibitor of cyclooxygenase-2. In experimental biology, it has been employed to inhibit chloride channel Chloride channels are a superfamily of poorly understood ...

and

pranoprofen Pranoprofen (INN) is a nonsteroidal anti-inflammatory drug (NSAID) used in ophthalmology Ophthalmology ( ) is a surgical subspecialty within medicine that deals with the diagnosis and treatment of eye disorders. An ophthalmologist is a physi ...

.{{Ullmann, doi=10.1002/14356007.a22_399, chapter=Pyridine and Pyridine Derivatives, year=2000, last1=Shimizu, first1=Shinkichi, last2=Watanabe, first2=Nanao, last3=Kataoka, first3=Toshiaki, last4=Shoji, first4=Takayuki, last5=Abe, first5=Nobuyuki, last6=Morishita, first6=Sinji, last7=Ichimura, first7=Hisao, isbn=3527306730

References

Amine oxides Pyridinium compounds Carboxylic acids