an>,  <span class="comment"># nitrobenzene</span></div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;                                              <span class="stringliteral">&#39;ETI&#39;</span>,  <span class="comment"># iodoethane</span></div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;                                              <span class="stringliteral">&#39;SER&#39;</span>,  <span class="comment"># serine</span></div><div class="line"