Cysteine

Hydroxychloroquine

Hydroxychloroquine drastically reduces immune activation in HIV-infected, antiretroviral therapy–treated immunologic nonresponders

https://ashpublications.org/blood/article/118/12/3263/28846/Hydroxychloroquine-drastically-reduces-immune

Cinchona Alkaloids—Derivatives and Applications

https://www.sciencedirect.com/science/article/abs/pii/S1099483118300294?via%3Dihub

Cinchona Alkaloids

https://www.alfachemic.com/catalysts/products/cinchona-alkaloids.html