pan class="co">#&gt; [15] "organic molecule (CHEBI:72695)"                    </span>
<span class="co">#&gt; [16] "histidine derivative (CHEBI:24599)"                </span>
<span class="co">#&gt; [17] "chemical entity (CHEBI:24431)"                     </span>
<span class="co">#&gt; [18] "organooxygen compound (CHEBI:36963)"               </span>
<span class="co">#&gt; [19] "peptide (CHEBI:16670)"                             </span>
<span class="co">#&gt; [20] "organonitrogen compound (CHEBI:35352)"       