这个词是什么意思？
2- or 4-Hydroxyestrogens. Substances that are physiologically active in mammals, especially in the control of gonadotropin secretion. Physiological activity can be ascribed to either an estrogenic action or interaction with the catecholaminergic system.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D002393 · MeSH 2026。
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