The effectiveness of Chaulmoogra oil brought other problems as well. He injected these patients with a mixture of chaulmoogra oil, resorcin, and camphorated oil. "Review of treatments of leprosy, especially on chaulmoogra oil". A common pre-modern treatment of leprosy was chaulmoogra oil. Hydnocarpus wightianus, Hydnocarpus wightiana, or chaulmoogra is a tree in the Achariaceae family. In 1919, he worked at Kyushu Sanatorium Kikuchi Keifuen Sanatorium and studied chaulmoogra oil. In the 1940s chaulmoogra oil was replaced by the more effective sulfones.