Title: Relationship between pyrimidines, purines and fatty acids in milk of dairy cows fed distinct carbohydrate types: a metabolomic approach Authors: Giulio Giagnoni, Martin Riis Weisbjerg, Michela Errico, Marco Lapris, Nina Aagaard Poulsen, Julia Prangchat Stub Thomsen, Antonio Gallo, Gabriele Rocchetti Supplementary material for the manuscript. Compounds analyzed by Ultra High-Performance Liquid Chromatography and High-Resolution Mass Spectrometry in milk samples of cows fed either corn or grass-clover as silage, and barley or dried beet pulp in the concentrate fraction.