   />
    <title>RDKit.js - React Example</title>
    <style>
      .back_to_top {
        position: fixed;
        bottom: 80px;
        right: 40px;
        z-index: 9999;
        width: 30px;
        height: 30px;
        text-align: center;
        line-height: 30px;
        background: #f5f5f5;
        color: #444;
        cursor: pointer;
        border-radius: 2px;
        display: block;
      }

      .back_to_top:hover {
        background: #e9ebec;
      }
    </style>
  </head>
  <body>
    <nos