{[(s)-{[(2r,3s,4r,5r)-5-(2-amino-6-oxo-1,6-dihydro-9h-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl]methoxy}(hydroxy)phosphoryl]oxy}(hydroxy)phosphoryl]oxy}methyl)-3,4-dihydroxytetrahydrofuran-2-yl]pyridinium</span></div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;                                              <span class="stringliteral">&#39;2MO&#39;</span>,  <span class="comment"># molybdenum (iv)oxide</span></div><div class="line"><a name="l00249"></a><span class="lineno"