China to regulate carfentanil, seen as 'substantial step' in curbing opioid exports

Dealers cut fentanyls into heroin and other drugs to boost profit margins. Beijing already regulates fentanyl and 18 related compounds. China said it is also placing carfentanil’s less-potent cousins furanyl fentanyl, acryl fentanyl and valeryl fentanyl …
( read original story …)