I didn't find in Dr. Duke's database, any information about the uses of Bersama tysoniana
Here is some basic information about Bersama tysoniana.
Bersama tysoniana basic info
Scientific Name: Bersama tysoniana Oliv..
Common names in English: bitterbark.
Bersama tysoniana in other websites
Bersama tysoniana common names, economics importance, distributional range and more in the USDA GRIN website - See link
Search PubMed (US National Library of Medicine National Institutes of Health) for academic researches with the search term Bersama tysoniana - See link
See if there is something in Youtube on the term Bersama tysoniana - See link