Need help extracting values from several lists

Need help extracting values from several lists

    Given the following html, how would I get the numbers in parenthesis into an array?
    So I'd like my array to be {404493,404504}

    1. <div class="current-config popup-panel featherlight-inner" >
    2.     <div class="dyn-conf-content">
    3.         <h3 class="left-align production-color">Current Configuration</h3>
    4.         <p class="dimensions cc-highlight">
    5.             <span class="config-label">W × D × H</span> 
    6.             <span class="dim-inches">32.9" × 34.6" × 48.4"</span><br>
    7.             <span class="dim-metric">836mm × 879mm × 1229mm</span></p>
    8.             <hr>
    9.         <div class="selected-options">
    10.             <div id="cf-list-step-1" class="ycfeatures config-label">
    11.                 Main Unit
    12.                 <ul>
    13.                     <li>Pro C5100s (404493)</li>
    14.                 </ul>
    15.             </div>
    16.             <div id="cf-list-step-2" class="ycfeatures config-label" style="display: none;">
    17.                 Additional Paper Sources
    18.                 <ul>
    19.                 </ul>
    20.             </div>
    21.             <div id="cf-list-step-3" class="ycfeatures config-label">
    22.                 Controller Options
    23.                 <ul>
    24.                     <li>Fiery Color Controller E-42B (404504)</li>
    25.                 </ul>
    26.             </div>
    27.         </div>
    28.     </div>
    29. </div>

    The div with the class "current-config popup-panel featherlight-inner" is unique in the dom.