Tetramine is a typical name for a chemical containing four amine groups. Some examples are:
Triethylenetetramine ("trien"), a.k.a. 1,4,7,10-Tetraazadecane 1,4,8,11-Tetraazaundecane Hexamethylenetetramine (hexamine) All of the abive are examples of a polyamine.
Tetramethylenedisulfotetramine (TETS), a rodenticide banned in most countries Tetramine is also used as a synonym for the tetramethylammonium cation.