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Chemical structure of natural products: Thymoquinone (A), Catechin (B), Epigalloctatin gallate (C), Curcumin (D), Berberine (E), Pilocarpine (F), Genistein (G), Resveratrol (H), Quercetin (I), Naringenin (J), Kaempferol (K), Baicalin (L), Baicalein (M), Tetrandrine (N), Mangiferin (O), Lutein (P), Combretastatin A4 (Q).
