ss="comment"># cyclohexane</span></div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;                                              <span class="stringliteral">&#39;CME&#39;</span>,  <span class="comment"># s,s-(2-hydroxyethyl)thiocysteine</span></div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                                              <span class="stringliteral">&#39;THB&#39;</span>,  <span class="comment"># tetrahydrobiopterin</span></di