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Structures of polyphenolic phytochemicals, estrogens, and structurally related compounds. (A) Stilbenes. SITS, 4-Acetamido-4′-isothiocyanostilbene 2,2′-disulfonate; DIDS, 4,4′-diisothiocyanatostilbene-2,2′-disulfonic acid. (B) Flavones and isoflavones. (C) Other polyphenolic phytochemicals. ECG, epicatechin gallate; EGCG, epigallocatechin gallate. (D) Steroidal estradiols and estrogen metabolites.
