“…KHG26792, 3-(naphthalen-2-yl(propoxy)methyl)azetidine hydrochloride, was synthesized at the Organic Chemistry Laboratory (KIST, Seoul, Korea) [13], dissolved in DMSO, and stored at -20℃ as a stock solution (50 mM). Dulbecco's Modified Eagle's Medium (DMEM), Nutrient Mixture F-12 Ham, sodium bicarbonate, HEPES, formaldehyde, insulin, L-ascorbic acid, isoproterenol, hydrocortisone, 12-O-tetradecanoylphorbol-13-acetate (TPA), cholera toxin (CT), synthetic melanin, L-DOPA, and mushroom tyrosinase were obtained from Sigma (St Louis, MO, USA).…”