fentanyl precursor

4-ANPP is not a term that most of you know but it's hugely important. It is the chemical that is the precursor to fentanyl. Although 4-ANPP is not an opioid, there is not a single thing anyone would do with it except convert it to fentanyl. And there is plenty of 4-ANPP to be had now the bad guys use synthetic organic chemistry to make it.