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(a)–(f) Monophenolase activity inhibition rates at 10, 30, 60, 90, 120, and 240 min, respectively. (g)–(l) Diphenolase activity inhibition rates at 10, 30, 60, 90, 120, and 240 min, respectively. ∗∗P < 0.01 versus β-arbutin,∗P < 0.05 versus β-arbutin, ##P < 0.01, #P < 0.05 self-comparison of flavonoids, &&P < 0.01, &P < 0.05 self-comparison of β-arbutin.
