One of the Chinese aliases of zearalanol is zearalanol, and one of its English names is a-zearalanol. CAS number 26538-44-3, molecular formula C18H26O5, molecular weight 322.4. It exists in the seeds of Pharbitis nil(L.) Choisy, a plant in the Convolvulaceae family, and can also be chemically synthesized. As a food additive. Animal experiments have proven estrogenic activity.