To have a chance against Kurzen, we need his healing support neutralized. He has gathered around him a large number of Medicine Men who heal his forces with Jungle Remedies and poison our fighters with Venom Fern Extracts. We need those remedies to cure our own people, and we need a sample of those extracts to study so we can make our own remedies. Search the Kurzen Compound for both - his Medicine Men will have the remedies, and the extracts are probably stowed in some of the camp's supply boxes.