Identification of Novel Melanin Synthesis Inhibitors From Crataegus pycnoloba Using an in Vivo Zebrafish Phenotypic Assay oleh Adamantia Agalou, Michael Thrapsianiotis, Apostolis Angelis, Athanasios Papakyriakou, Alexios-Leandros Skaltsounis, Nektarios Aligiannis, Dimitris Beis