/span> <span class="st">'138261-41-3'</span>)
<span class="co"># query</span>
<span class="no">l</span> <span class="kw">=</span> <span class="fu"><a href="reference/stx_query.html">stx_query</a></span>(<span class="kw">cas</span> <span class="kw">=</span> <span class="no">cas</span>,
              <span class="kw">endpoint</span> <span class="kw">=</span> <span class="st">'XX50'</span>,
              <span class="kw">taxa</span> <span class="kw">=</span> <span class="fu"><a href="https://rdrr.io/r/base/gre