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Panel (A): green tea mixture (1: (−)-gallocatechin; 2: caffeine; 3: (+)-catechin; 4: (−)-epicatechin; 5: (−)-epigallocatechin-3-galate; 6: (−)-gallocatechin galate; 7: (−)-catechin 3-gallate; 8: epicatechin 3-gallate). Panel (B): representative chromatogram of Camellia sinensis callus cell lysate (1: (−)-epicatechin).
