Organic compounds derived by replacing one or more of the hydrogen atoms in ammonia by organic groups (see illustration). Primary amines have one hydrogen replaced, e.g. methylamine, CH3NH2. They contain the functional group –NH2 (the amino group). Secondary amines have two hydrogens replaced, e.g. methylethylamine, CH3(C2H5)NH. Tertiary amines have all three hydrogens replaced, e.g. trimethylamine, (CH3)3N. Amines are produced by the decomposition of organic matter. They can be made by reducing nitro compounds or amides. See also imines.
https://www.acdlabs.com/iupac/nomenclature/93/r93_398.htm Information about IUPAC nomenclature of primary amines
https://www.acdlabs.com/iupac/nomenclature/93/r93_402.htm Information about IUPAC nomenclature of secondary and tertiary amines