<span class="citations"><p>Manfred Baumgarth, Dieter Orth, Jurgen Harting, Hans Schaefer, Achim Zesch, "Hydrocortisone orthoesters, pharmaceutical formulations thereof and processes for the preparation thereof." U.S. Patent US4264584, issued March, 1974.</p>
</span><a href="https://www.google.com/?tbm=pts#q=4264584&amp;tbm=pts" rel="noopener" target="_blank">US4264584</a>