Niaziminin, a Thiocarbamate from the Leaves of Moringa oleifera, Holds a Strict Structural Requirement for Inhibition of Tumor-Promoter-Induced Epstein-Barr Virus Activation - Murakami, Akira; Kitazono, Yumi; Jiwajinda, Suratwadee; Koshimizu, Koichi; Ohigashi, Hajime (Planta Medica, 1998)