[phosphoethanolamine] was developed in the early 1990s by Gilberto Chierice, an analytical chemist at the University of São Paulo whose lab distributed it to patients free of charge for several years, without any regulatory approval or clinical oversight.
[...]
The university tried to shut down Chierice’s operation in June 2014, but since then more than 15,000 people sued the university, forcing it to continue providing them with the pills. Advocacy groups, meanwhile, pressured politicians and health authorities to legalize use of the compound as a cancer drug.
https://www.sciencemag.org/news/2016/04/brazil-president-signs-law-legalizing-renegade-cancer-pill [sciencemag.org]