3M had a license to patent adrenochrome until the patent was stopped last year, 2020, the same day Trump called out 3M for mask shipment issues on public TV. That day, the patent was cancelled. The NIH website had adrenochrome (using code) listed as a cancer therapy. It was not hidden for another country, but was hidden for USA. It was hidden (my thoughts), because it was known to be illegal. I found it while researching Wuhan Labs on NIH website for a bat-mite fungus bio-weapon virus, before I fully understood what was required to produce adrenochrome, and what was documented by the NIH.