Introductory: The books is suggested that it is appropriate to give the brief note about hereto cyclic compounds bearing Trazine, Altretamine, Triethylenemelamine, Melamine, Atrazine, 4-aminobenzene-1-sulfonyl chloride and azetidinone derivatives disussions.this book is useful for those researcher who are involved to work in such compounds. Heterocyclic compounds of melamine work is also included in this book.