comment"># beryllium difluoride</span></div><div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;                                              <span class="stringliteral">&#39;CO&#39;</span>,  <span class="comment"># cobalt (ii) ion</span></div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;                                              <span class="stringliteral">&#39;NGD&#39;</span>, <span class="comment"># 3-(aminocarbonyl)-1-[(2r,3r,4s,5r)-5-({[(s)-