Cepharadione B
Cepharadione B (compound 22) is a natural compound isolated from the leaves of Piper sanctum. Cepharadione B is a tyrosinase inhibitor with an IC50 value of 170 μM, and inhibits cell growth in A-549, SK-OV-3, SK-MEL-2, XF-498 and HCT-15 cells[1][2][3].