References
1. M.A. Peralta, et al. Flavanoids from Dalea elegans: Chemical reassignment and determination of kinetics parameters related to their anti-tyrosinase activity, Phytochem. Lett. 10 (2014) 260–267. 
2. María D. Santi, et al. Melanogenic inhibitory effects of a methoxylated chalcone isolated from Dalea elegans on murine melanoma B16F0 cells, ex in vivo and molecular docking studies. Bioorganic and medicinal chemistry  27 ( 2019)  3722-3728.