Mexican cartels

The recent meeting between President Biden and China's President Xi Jinping delved into the U.S. fentanyl crisis, centering on the export of fentanyl chemical precursors from China to Mexico, where they are converted into fentanyl. However, there is an inherent challenge in restricting precursor chemicals. A minimally trained organic chemist can either make them or simply use a different, unrestricted chemical. Thus, any international agreement designed to minimize fentanyl by restricting precursors is likely to fail, defeated by organic chemistry.