Isoliquiritigenin, a flavonoid from licorice, reduces prostaglandin E2 and nitric oxide, causes apoptosis, and suppresses aberrant crypt foci development - Takahashi, T; Takasuka, N; Iigo, M; Baba, M; Nishino, H; Tsuda, H; Okuyama, T (Cancer Sci, 2004)