^Foreman EL, Miller CO. Synthetic Estrogenic Substances. II. Hexesterol and Some of its Esters. Journal of the American Chemical Society. 1941, 63 (8): 2240. doi:10.1021/ja01853a060.
Note: Though not listed here, many anabolic steroids can also be estrogenic as they can be aromatized into estrogen-like metabolites that possess estrogenic activity.