Coffee has been used for hundreds years as a functional drink，and is called as first beverage. So coffee has been attracted people’s attention for its various chemical constituents and biological activities. In a couple of past decades, with the promotion of coffee growing and processing industry in Yunnan by government of China, Yunnan are becaming one of cultivation base of Coffea arabica in the world.
In recent years, Our Research Group (Group of Phytochem & Phytoresources of KIB) began to study the chemical constituents from Coffea arabica cultivated in Yunnan and their biological functions, and got many research results. In the report, we would like to present the contents and distributions of amino acids, carbohydrate (reducible sugars), chemical composition of essential oil and volatile substances, seed oil, derivatives of caffeoylquinic acid quinic acid, caffeine, trigonelline, chlorogenic acid, and so on in Yunnan Coffea arabica by the modern analysis technologies of GC-MS, LC-MS, HPLC, NMR.
It is worth mentioning that the 22 new compounds, including 19 diterpenoids and 3 Tryarmine alkaloids were isolated from Yunnan Coffea arabica, and those new chemical structures were established. Among them, Five new diterpenoid glycosides, named mascaroside I (1), mascaroside Ⅱ(2), aglycone E (3), cofaryloside I (4), and villanovane I (5) (JAFC, 2014, p2631-2637)were isolated from the acetone extracts of the roasted coffee bean cultivated in Yunnan Province of CHINA., and 14 diterpene esters, 3 Tryarmine alkaloids were isolated from the green coffee bean collected in same place.  Their chemical structures were established by extensive spectroscopic analyses including 1D and 2D NMR (HSQC, HMBC, COSY and ROESY). As well as our group curried out the biologic functions of those substances.
In this report，we also would like to to be outlook the foregrounds of coffee chemical research and the development of CHINA coffee industry (including growing side and processing side ) in near future.