2-Hydroxy-4-methoxybenzaldehyde, a chemical compound and an isomer of Vanillin, could be used to synthesis Urolithin M7[1]. 2-hydroxy-4-methoxybenzaldehyde is a potent tyrosinase inhibitor from three East African medicinal plants, Mondia whitei, Rhus vulgaris Meikle, and Sclerocarya caffra Sond[2].
[1]. Bodwell Graham, et al. An Inverse Electron-Demand Diels-Alder-Based Total Synthesis of Urolithin M7. Synlett. 2011 (15): 2245. [2]. Kubo I, et al. 2-Hydroxy-4-methoxybenzaldehyde: a potent tyrosinase inhibitor from African medicinal plants. Planta Med. 1999 Feb;65(1):19-22.