<span class="citations"><p>Ketan Dhansukhlal Vyas, Wajid Sajjad Jafri, Ashok Krishna Kulkarni, "Process for preparing carbamazepine from iminostilbene." U.S. Patent US6245908, issued February, 1998.</p>
</span><a href="https://www.google.com/?tbm=pts#q=6245908&amp;tbm=pts" rel="noopener" target="_blank">US6245908</a>