<span class="citations"><p>Jean Paul REMON, Chris Vervaet, "QUININE AND QUINIDINE SALTS, METHODS FOR MAKING THEM, AND PHARMACEUTICAL FORMULATIONS COMPRISING THEM." U.S. Patent US20090239900, issued September 24, 2009.</p>
</span><a href="https://www.google.com/?tbm=pts#q=20090239900&amp;tbm=pts" rel="noopener" target="_blank">US20090239900</a>