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Chemical structures of tested compounds. Characteristic substituents linked to parent flavan-3-ol structure present in catechin derivatives are highlighted in red. The acronyms refer to: C – (+)-catechin, EC – (-)-epicatechin, EGC – (-)-epigallocatechin, ECG – (-)-epicatechin gallate, EGCG – (-)-epigallocatechin gallate.
