Fig. 4.

The synthetic path of adenosine in microdroplets with Mg²⁺ catalyst. (A) Mass spectra for the products of reaction between adenine and Rib-1-P and (B) the mechanism of salvage reaction between adenine and Rib-1-P to give adenosine. Red letters denote the detected m/z peak of the adenosine from an abiotic salvage reaction. (C) Mass spectrum for the products of reaction between d-ribose and adenine in the absence of phosphate and (D) the previously assumed mechanism for the direct ribosylation of adenine. C₆H₁₃N and P denote a fragment of adenine (cyclohexylamine) and phosphoric acid.