All
 D03 Heterocyclic Compounds D006571 +
 D03.066 Acids, Heterocyclic D000147 +
 D03.066.515 Nicotinic Acids D009539 +
 D03.066.515.292 Arecoline D001115 
 D03.066.515.375 Clonixin D003002 
 D03.066.515.400 Etazolate D004974 
 D03.066.515.475 Niacin D009525 
 D03.066.515.540 Niceritrol D009531 
 D03.066.515.530 Niacinamide D009536 +
 D03.066.515.550 Niflumic Acid D009544 
 D03.066.515.635 Pipemidic Acid D010876 
 D03.066.515.650 Piromidic Acid D010893 
 D03.066.515.950 Xanthinol Niacinate D014971