0091"></a><span class="lineno">   91</span>&#160;                                              <span class="stringliteral">&#39;NO2&#39;</span>,  <span class="comment"># nitrite ion</span></div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;                                              <span class="stringliteral">&#39;CMP&#39;</span>,  <span class="comment"># adenosine-3&#39;,5&#39;-cyclic-monophosphate</span></div><div class="line"><a name="l00093"></a><span class="lineno">  