2 '- deoxyadenosine is a natural deoxyribonucleoside, which is a structural fragment of deoxyribonucleic acid DNA. Like other natural nucleotides, it participates in the transmission of genetic information in almost all biological cells, affects protein synthesis and polysaccharide metabolism, and plays a crucial regulatory role in the growth, proliferation, differentiation, and inhibition of cells in organisms. It is not only an important raw material for genetic drug and genetic engineering research, but also has good physiological activity. 2 '- deoxyadenosine can inhibit glucose induced insulin release and reduce the role of specific phosphodiesterase inhibitors or adenosine cyclase activators in promoting insulin secretion.