Zerumbone, a Southeast Asian ginger sesquiterpene, markedly suppresses free radical generation, proinflammatory protein production, and cancer cell proliferation accompanied by apoptosis: the alpha, beta-unsaturated carbonyl group is a prerequisite - Murakami,A.; Takahashi,D.; Kinoshita,T.; Koshimizu,K.; Kim,H.W.; Yoshihiro,A.; Nakamura,Y.; Jiwajinda,S.; Terao,J.; Ohigashi,H. (Carcinogenesis, 2002)