"Socalj" for Borderland Beat The U.S. Treasury Department sanctioned more than 20 individuals and companies involved in the global supply chain of chemical precursors and the production of synthetic drugs that have collaborated with the Sinaloa Cartel, specifically Los Chapitos and Los Mayos. The precursor chemicals for producing both fentanyl and methamphetamine were shipped from India through Guatemala, to Sinaloa and Guadalajara in Mexico.