We published "Separation of highly hydrophilic nicotinamide metabolites using a COSMOSIL PBr column" in MethodsX, 2023, 10. 102061.DOI: https://doi.org/10.1016/j.mex.2023.102061Abstract: Highly hydrophilic compounds such as nicotinamide metabolites are very difficult to separate via high-performance liquid chromatography...