... Methylene analogues of adenosine 5Â-tetraphosphate Their chemical synthesis and recognition by human and plant mononucleoside tetraphosphatases and dinucleoside tetraphosphatases Andrzej ... pCH2pCH2pA. Synthesis of adenosine- 5’-[a,b,b, c-bis (methylene) ]-tetraphosphate, ppCH2pCH2pA. Synthesis of adenosine- 5-[a,b;c,d-bis (methylene) ]-tetraphosphate, pCH2ppCH2pA. Methylene analogues of adenosine ... Estonia.) Chemical synthesis of p4A analogues Analogues with one methylene bridge Adenosine 5Â-methylenebisphosphonate was obtained by regioselective 5Â-phosphonylation of adenosine with methyl-enebis(dichlorophosphonate)...