<span class="citations"><p>Zita Mendes, Jose Rafael Antunes, Susana Marto, William Heggie, "Crystalline Minocycline Base and Processes for its Preparation." U.S. Patent US20100286417, issued November 11, 2010.</p>
</span><a href="https://www.google.com/?tbm=pts#q=20100286417&amp;tbm=pts" rel="noopener" target="_blank">US20100286417</a>