[1] I U P AC: Nomenclature of Orfsanic Chemisty ,Section A , B, ed 3 ; Ced.2 , p25; 104; 108;122, Butterwort hs. London, 1971
[2]Cahn RS et al: introduction to Chemical No-menclatur ed5, p82; 117; 125, Butter worths,London-Boston, 1979
[3] C A, Cumulative Index Guide, P 315G ,Vo1. 76-85,1972 -1976
[4]BPC, P 154, 1973
[5] The Merck Inder, ed 9 , p394, Merck & Co. INC USA, 1976