Prepn from naringen, a flavanone glycoside occurring naturally in grapefruit: Horowitz, Gentile, US 3087821 and US 3375242 (1963, 1968, both to U.S. Secy. Agr.); Robertson et al., Ind. Eng. Chem. Prod. Res. Dev. 13, 125 (1974). Sweetening effect: Inglett et al., J. Food Sci. 34, 101 (1969). Chromatography: Gentile, Horowitz, J. Chromatogr. 63, 467 (1971); J. F. Fisher, J. Agric. Food Chem. 25, 682 (1977). Subchronic oral toxicity study: B. A. R. Lina et al., Food Chem. Toxicol. 28, 507 (1990). Review: P. J. Pratter, Perfum. Flavor. 5, 12-18 (1981).