They are classified as primary, secondary or tertiary depending on how many alkyl or aromatic groups are attached to the central nitrogen atom.  
Two examples of this class of compounds are cadaverine and putrescine, which are known for their terrible odors.  Members of this class, including codeine, caffeine, and several neurotransmitters, react with acids to form acid salts since they are weak bases.  They are classified as primary, secondary or tertiary depending on how many alkyl or aromatic groups are attached to the central nitrogen atom.  Created from substituting carbon-nitrogen bonds for one or more of the carbon-nitrogen bonds on a molecule of ammonia, FTP, name these compounds with general formula R3N.
Two examples of this class of compounds are cadaverine and putrescine, which are known for their terrible odors.  
amines