A potent inhibitor of SIK2, 3, 3′, 7-trihydroxy-4′-methoxyflavon (4′-o-methylfisetin), promotes melanogenesis in B16F10 melanoma cells - Kumagai, A; Horike, N; Satoh, Y; Uebi, T; Sasaki, T; Itoh, Y; Hirata, Y (PLoS One, 2011)