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Inhibitory effects of the coumarins derivatives against mushroom tyrosinase activity: 3-aryl and 3-heteroarylcoumarins (1–10, 23–24), 3-hydroxycoumarin (11), 4-hydroxycoumarin (12), 6-hydroxycoumarin (13), 7-hydroxycoumarin (14), umbelliferone analogs (15–16), Esculetin (17) umbelliferone (18), 3-phenyl coumarins with bromo substituent (19), thiophosphonic acid diamides (20–22).
