,  <span class="comment"># cobalt (iii) ion</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;                                              <span class="stringliteral">&#39;BUQ&#39;</span>,  <span class="comment"># 4-hydroxy-2-butanone</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;                                              <span class="stringliteral">&#39;NAG&#39;</span>,  <span class="comment"># n-acetyl-d-glucosamine</s